102021021231 has 32 divisors (see below), whose sum is σ = 148358298816. Its totient is φ = 62106624000.

The previous prime is 102021021217. The next prime is 102021021233. The reversal of 102021021231 is 132120120201.

It is not a de Polignac number, because 102021021231 - 2¹⁰ = 102021020207 is a prime.

It is a super-2 number, since 2×102021021231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102021021231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021021233) 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, 243691 + ... + 513251.

It is an arithmetic number, because the mean of its divisors is an integer number (4636196838).

Almost surely, 2^102021021231 is an apocalyptic number.

102021021231 is a deficient number, since it is larger than the sum of its proper divisors (46337277585).

102021021231 is a wasteful number, since it uses less digits than its factorization.

102021021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269803.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102021021231 its reverse (132120120201), we get a palindrome (234141141432).

The spelling of 102021021231 in words is "one hundred two billion, twenty-one million, twenty-one thousand, two hundred thirty-one".