121000256120 has 32 divisors (see below), whose sum is σ = 272261228400. Its totient is φ = 48398208768.

The previous prime is 121000256107. The next prime is 121000256189. The reversal of 121000256120 is 21652000121.

It is a super-2 number, since 2×121000256120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121000256092 and 121000256101.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1452971 + ... + 1533989.

Almost surely, 2^121000256120 is an apocalyptic number.

121000256120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000256120 is an abundant number, since it is smaller than the sum of its proper divisors (151260972280).

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

121000256120 is a wasteful number, since it uses less digits than its factorization.

121000256120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118367 (or 118363 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 121000256120 its reverse (21652000121), we get a palindrome (142652256241).

The spelling of 121000256120 in words is "one hundred twenty-one billion, two hundred fifty-six thousand, one hundred twenty".