102111001212 has 72 divisors (see below), whose sum is σ = 264481325136. Its totient is φ = 30636320000.

The previous prime is 102111001189. The next prime is 102111001229. The reversal of 102111001212 is 212100111201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201489 + ... + 494792.

It is an arithmetic number, because the mean of its divisors is an integer number (3673351738).

Almost surely, 2^102111001212 is an apocalyptic number.

102111001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102111001212 is an abundant number, since it is smaller than the sum of its proper divisors (162370323924).

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

102111001212 is a wasteful number, since it uses less digits than its factorization.

102111001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696411 (or 696398 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102111001212 its reverse (212100111201), we get a palindrome (314211112413).

The spelling of 102111001212 in words is "one hundred two billion, one hundred eleven million, one thousand, two hundred twelve".