231230212132021 has 8 divisors (see below), whose sum is σ = 231591131972640. Its totient is φ = 230869568122512.

The previous prime is 231230212131991. The next prime is 231230212132027. The reversal of 231230212132021 is 120231212032132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231230212132021 is a prime.

It is a super-2 number, since 2×231230212132021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231230212132027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67279831 + ... + 70633108.

It is an arithmetic number, because the mean of its divisors is an integer number (28948891496580).

Almost surely, 2^{231230212132021} is an apocalyptic number.

It is an amenable number.

231230212132021 is a deficient number, since it is larger than the sum of its proper divisors (360919840619).

231230212132021 is a wasteful number, since it uses less digits than its factorization.

231230212132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137915555.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 231230212132021 its reverse (120231212032132), we get a palindrome (351461424164153).

The spelling of 231230212132021 in words is "two hundred thirty-one trillion, two hundred thirty billion, two hundred twelve million, one hundred thirty-two thousand, twenty-one".