12111211212210 has 64 divisors (see below), whose sum is σ = 35232614444160. Its totient is φ = 2936051202240.

The previous prime is 12111211212193. The next prime is 12111211212313. The reversal of 12111211212210 is 1221211211121.

It is a happy number.

12111211212210 is a `hidden beast` number, since 1 + 21 + 11 + 211 + 212 + 210 = 666.

12111211212210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12111211212210² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2038921477 + ... + 2038927416.

It is an arithmetic number, because the mean of its divisors is an integer number (550509600690).

Almost surely, 2^{12111211212210} is an apocalyptic number.

12111211212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111211212210 is an abundant number, since it is smaller than the sum of its proper divisors (23121403231950).

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

12111211212210 is a wasteful number, since it uses less digits than its factorization.

12111211212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077848920 (or 4077848914 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12111211212210 its reverse (1221211211121), we get a palindrome (13332422423331).

The spelling of 12111211212210 in words is "twelve trillion, one hundred eleven billion, two hundred eleven million, two hundred twelve thousand, two hundred ten".