121231001313021 has 32 divisors (see below), whose sum is σ = 165820691312640. Its totient is φ = 78757806945600.

The previous prime is 121231001312923. The next prime is 121231001313031. The reversal of 121231001313021 is 120313100132121.

It is not a de Polignac number, because 121231001313021 - 2⁴² = 116832954801917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231001313031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3879756 + ... + 16047258.

It is an arithmetic number, because the mean of its divisors is an integer number (5181896603520).

Almost surely, 2^{121231001313021} is an apocalyptic number.

It is an amenable number.

121231001313021 is a deficient number, since it is larger than the sum of its proper divisors (44589689999619).

121231001313021 is a wasteful number, since it uses less digits than its factorization.

121231001313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12168057.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 121231001313021 its reverse (120313100132121), we get a palindrome (241544101445142).

The spelling of 121231001313021 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, one million, three hundred thirteen thousand, twenty-one".