121121010210120 has 128 divisors (see below), whose sum is σ = 371872821398400. Its totient is φ = 31551255025664.

The previous prime is 121121010210023. The next prime is 121121010210139. The reversal of 121121010210120 is 21012010121121.

It is a happy number.

It is a super-2 number, since 2×121121010210120² (a number of 29 digits) contains 22 as substring.

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 121121010210120.

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 31 ways as a sum of consecutive naturals, for example, 67432347 + ... + 69205226.

It is an arithmetic number, because the mean of its divisors is an integer number (2905256417175).

Almost surely, 2^{121121010210120} is an apocalyptic number.

121121010210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121010210120 is an abundant number, since it is smaller than the sum of its proper divisors (250751811188280).

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

121121010210120 is a wasteful number, since it uses less digits than its factorization.

121121010210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136637759 (or 136637755 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121121010210120 its reverse (21012010121121), we get a palindrome (142133020331241).

The spelling of 121121010210120 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, ten million, two hundred ten thousand, one hundred twenty".