211111220221122 has 32 divisors (see below), whose sum is σ = 454899044420352. Its totient is φ = 64929019284864.

The previous prime is 211111220221073. The next prime is 211111220221147. The reversal of 211111220221122 is 221122022111112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588970618 + ... + 589328949.

It is an arithmetic number, because the mean of its divisors is an integer number (14215595138136).

Almost surely, 2^{211111220221122} is an apocalyptic number.

211111220221122 is an abundant number, since it is smaller than the sum of its proper divisors (243787824199230).

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

211111220221122 is a wasteful number, since it uses less digits than its factorization.

211111220221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178301882.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211111220221122 its reverse (221122022111112), we get a palindrome (432233242332234).

The spelling of 211111220221122 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twenty-two".