102312121212 has 36 divisors (see below), whose sum is σ = 295568350896. Its totient is φ = 29232034560.

The previous prime is 102312121201. The next prime is 102312121213. The reversal of 102312121212 is 212121213201.

102312121212 is a `hidden beast` number, since 10 + 231 + 212 + 1 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

102312121212 is a modest number, since divided by 121212 gives 102312 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312121213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202999989 + ... + 203000492.

Almost surely, 2^102312121212 is an apocalyptic number.

102312121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102312121212 is an abundant number, since it is smaller than the sum of its proper divisors (193256229684).

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

102312121212 is a wasteful number, since it uses less digits than its factorization.

102312121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406000498 (or 406000493 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 102312121212 its reverse (212121213201), we get a palindrome (314433334413).

The spelling of 102312121212 in words is "one hundred two billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twelve".