212211022121210 has 128 divisors (see below), whose sum is σ = 444765499858944. Its totient is φ = 71398596568320.

The previous prime is 212211022121191. The next prime is 212211022121239. The reversal of 212211022121210 is 12121220112212.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1520099132 + ... + 1520238728.

It is an arithmetic number, because the mean of its divisors is an integer number (3474730467648).

Almost surely, 2^{212211022121210} is an apocalyptic number.

212211022121210 is an abundant number, since it is smaller than the sum of its proper divisors (232554477737734).

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

212211022121210 is a wasteful number, since it uses less digits than its factorization.

212211022121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141108.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212211022121210 its reverse (12121220112212), we get a palindrome (224332242233422).

The spelling of 212211022121210 in words is "two hundred twelve trillion, two hundred eleven billion, twenty-two million, one hundred twenty-one thousand, two hundred ten".