1220001221010 has 128 divisors (see below), whose sum is σ = 3473951120640. Its totient is φ = 270304128000.

The previous prime is 1220001220961. The next prime is 1220001221059. The reversal of 1220001221010 is 101221000221.

It is an interprime number because it is at equal distance from previous prime (1220001220961) and next prime (1220001221059).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 974545 + ... + 1841124.

It is an arithmetic number, because the mean of its divisors is an integer number (27140243130).

Almost surely, 2^{1220001221010} is an apocalyptic number.

1220001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220001221010 is an abundant number, since it is smaller than the sum of its proper divisors (2253949899630).

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

1220001221010 is a wasteful number, since it uses less digits than its factorization.

1220001221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815804.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1220001221010 its reverse (101221000221), we get a palindrome (1321222221231).

The spelling of 1220001221010 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty-one thousand, ten".