231021025105 has 128 divisors (see below), whose sum is σ = 337434854400. Its totient is φ = 150166732800.

The previous prime is 231021025087. The next prime is 231021025129. The reversal of 231021025105 is 501520120132.

It is not a de Polignac number, because 231021025105 - 2¹³ = 231021016913 is a prime.

It is a super-2 number, since 2×231021025105² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 134235645 + ... + 134237365.

It is an arithmetic number, because the mean of its divisors is an integer number (2636209800).

Almost surely, 2^231021025105 is an apocalyptic number.

It is an amenable number.

231021025105 is a deficient number, since it is larger than the sum of its proper divisors (106413829295).

231021025105 is a wasteful number, since it uses less digits than its factorization.

231021025105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 231021025105 its reverse (501520120132), we get a palindrome (732541145237).

The spelling of 231021025105 in words is "two hundred thirty-one billion, twenty-one million, twenty-five thousand, one hundred five".