102120231 has 16 divisors (see below), whose sum is σ = 147952640. Its totient is φ = 62415360.

The previous prime is 102120203. The next prime is 102120301. The reversal of 102120231 is 132021201.

It is not a de Polignac number, because 102120231 - 2⁶ = 102120167 is a prime.

It is a super-2 number, since 2×102120231² = 20857083158986722, which 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 (102120131) 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, 27130 + ... + 30663.

It is an arithmetic number, because the mean of its divisors is an integer number (9247040).

Almost surely, 2^102120231 is an apocalyptic number.

102120231 is a deficient number, since it is larger than the sum of its proper divisors (45832409).

102120231 is a wasteful number, since it uses less digits than its factorization.

102120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57846.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102120231 is about 10105.4555068042. The cubic root of 102120231 is about 467.4163820441.

Adding to 102120231 its reverse (132021201), we get a palindrome (234141432).

The spelling of 102120231 in words is "one hundred two million, one hundred twenty thousand, two hundred thirty-one".