1201021122210 has 512 divisors, whose sum is σ = 3696717201408. Its totient is φ = 242984448000.

The previous prime is 1201021122199. The next prime is 1201021122221. The reversal of 1201021122210 is 122211201021.

It is an interprime number because it is at equal distance from previous prime (1201021122199) and next prime (1201021122221).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1201021122210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3219895584 + ... + 3219895956.

It is an arithmetic number, because the mean of its divisors is an integer number (7220150784).

Almost surely, 2^{1201021122210} is an apocalyptic number.

1201021122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201021122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848358600704).

1201021122210 is an abundant number, since it is smaller than the sum of its proper divisors (2495696079198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201021122210 is a wasteful number, since it uses less digits than its factorization.

1201021122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1201021122210 its reverse (122211201021), we get a palindrome (1323232323231).

It can be divided in two parts, 1201021 and 122210, that added together give a palindrome (1323231).

The spelling of 1201021122210 in words is "one trillion, two hundred one billion, twenty-one million, one hundred twenty-two thousand, two hundred ten".