12122221111210 has 64 divisors (see below), whose sum is σ = 25187762218752. Its totient is φ = 4114618269696.

The previous prime is 12122221111199. The next prime is 12122221111219. The reversal of 12122221111210 is 1211112222121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12122221111219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865404 + ... + 4999336.

It is an arithmetic number, because the mean of its divisors is an integer number (393558784668).

Almost surely, 2^{12122221111210} is an apocalyptic number.

12122221111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12122221111210 is an abundant number, since it is smaller than the sum of its proper divisors (13065541107542).

12122221111210 is a wasteful number, since it uses less digits than its factorization.

12122221111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134367.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12122221111210 its reverse (1211112222121), we get a palindrome (13333333333331).

The spelling of 12122221111210 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred ten".