102121230431 has 24 divisors (see below), whose sum is σ = 121168383840. Its totient is φ = 85738896320.

The previous prime is 102121230427. The next prime is 102121230481. The reversal of 102121230431 is 134032121201.

It is not a de Polignac number, because 102121230431 - 2² = 102121230427 is a prime.

It is a super-2 number, since 2×102121230431² (a number of 23 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 (102121230401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 551960 + ... + 713373.

It is an arithmetic number, because the mean of its divisors is an integer number (5048682660).

Almost surely, 2^102121230431 is an apocalyptic number.

102121230431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102121230431 is a deficient number, since it is larger than the sum of its proper divisors (19047153409).

102121230431 is a wasteful number, since it uses less digits than its factorization.

102121230431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265407 (or 1265396 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 102121230431 its reverse (134032121201), we get a palindrome (236153351632).

The spelling of 102121230431 in words is "one hundred two billion, one hundred twenty-one million, two hundred thirty thousand, four hundred thirty-one".