120100100121256 has 8 divisors (see below), whose sum is σ = 225187687727370. Its totient is φ = 60050050060624.

The previous prime is 120100100121187. The next prime is 120100100121257. The reversal of 120100100121256 is 652121001001021.

It can be written as a sum of positive squares in only one way, i.e., 115336645460100 + 4763454661156 = 10739490^2 + 2182534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (120100100121257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7506256257571 + ... + 7506256257586.

Almost surely, 2^{120100100121256} is an apocalyptic number.

It is an amenable number.

120100100121256 is a deficient number, since it is larger than the sum of its proper divisors (105087587606114).

120100100121256 is a wasteful number, since it uses less digits than its factorization.

120100100121256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15012512515163 (or 15012512515159 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 120100100121256 its reverse (652121001001021), we get a palindrome (772221101122277).

The spelling of 120100100121256 in words is "one hundred twenty trillion, one hundred billion, one hundred million, one hundred twenty-one thousand, two hundred fifty-six".