121021000113 has 16 divisors (see below), whose sum is σ = 173780956160. Its totient is φ = 74471370624.

The previous prime is 121021000091. The next prime is 121021000153. The reversal of 121021000113 is 311000120121.

It is not a de Polignac number, because 121021000113 - 2⁸ = 121020999857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021000153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203120 + ... + 1299822.

It is an arithmetic number, because the mean of its divisors is an integer number (10861309760).

Almost surely, 2^121021000113 is an apocalyptic number.

121021000113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121021000113 is a deficient number, since it is larger than the sum of its proper divisors (52759956047).

121021000113 is a wasteful number, since it uses less digits than its factorization.

121021000113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128808.

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

Adding to 121021000113 its reverse (311000120121), we get a palindrome (432021120234).

The spelling of 121021000113 in words is "one hundred twenty-one billion, twenty-one million, one hundred thirteen", and thus it is an aban number.