102012252690 has 32 divisors (see below), whose sum is σ = 244873676736. Its totient is φ = 27198348480.

The previous prime is 102012252679. The next prime is 102012252697. The reversal of 102012252690 is 96252210201.

It is a super-2 number, since 2×102012252690² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (102012252697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137212 + ... + 472071.

It is an arithmetic number, because the mean of its divisors is an integer number (7652302398).

Almost surely, 2^102012252690 is an apocalyptic number.

102012252690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102012252690 is an abundant number, since it is smaller than the sum of its proper divisors (142861424046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102012252690 is a wasteful number, since it uses less digits than its factorization.

102012252690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614874.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 102012252690 its reverse (96252210201), we get a palindrome (198264462891).

The spelling of 102012252690 in words is "one hundred two billion, twelve million, two hundred fifty-two thousand, six hundred ninety".