212120011222210 has 64 divisors (see below), whose sum is σ = 469930768699392. Its totient is φ = 67132007179776.

The previous prime is 212120011222151. The next prime is 212120011222309. The reversal of 212120011222210 is 12222110021212.

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, 139523167 + ... + 141035293.

It is an arithmetic number, because the mean of its divisors is an integer number (7342668260928).

Almost surely, 2^{212120011222210} is an apocalyptic number.

212120011222210 is an abundant number, since it is smaller than the sum of its proper divisors (257810757477182).

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

212120011222210 is a wasteful number, since it uses less digits than its factorization.

212120011222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666307.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212120011222210 its reverse (12222110021212), we get a palindrome (224342121243422).

The spelling of 212120011222210 in words is "two hundred twelve trillion, one hundred twenty billion, eleven million, two hundred twenty-two thousand, two hundred ten".