1201021210120 has 64 divisors (see below), whose sum is σ = 2732808521520. Its totient is φ = 474993967104.

The previous prime is 1201021210093. The next prime is 1201021210153. The reversal of 1201021210120 is 210121201021.

It can be written as a sum of positive squares in 8 ways, for example, as 905317996324 + 295703213796 = 951482^2 + 543786^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1201021210120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3858214 + ... + 4157866.

Almost surely, 2^{1201021210120} is an apocalyptic number.

1201021210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201021210120 is an abundant number, since it is smaller than the sum of its proper divisors (1531787311400).

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

1201021210120 is a wasteful number, since it uses less digits than its factorization.

1201021210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300794 (or 300790 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201021210120 its reverse (210121201021), we get a palindrome (1411142411141).

Subtracting from 1201021210120 its reverse (210121201021), we obtain a palindrome (990900009099).

It can be divided in two parts, 1201021 and 210120, that added together give a palindrome (1411141).

The spelling of 1201021210120 in words is "one trillion, two hundred one billion, twenty-one million, two hundred ten thousand, one hundred twenty".