211122221022 has 24 divisors (see below), whose sum is σ = 457450545240. Its totient is φ = 70371140400.

The previous prime is 211122221021. The next prime is 211122221033. The reversal of 211122221022 is 220122221112.

It is a happy number.

211122221022 is a `hidden beast` number, since 211 + 1 + 222 + 210 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 211122220986 and 211122221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122221021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223629 + ... + 687207.

It is an arithmetic number, because the mean of its divisors is an integer number (19060439385).

Almost surely, 2^211122221022 is an apocalyptic number.

211122221022 is an abundant number, since it is smaller than the sum of its proper divisors (246328324218).

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

211122221022 is a wasteful number, since it uses less digits than its factorization.

211122221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488888 (or 488885 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211122221022 its reverse (220122221112), we get a palindrome (431244442134).

The spelling of 211122221022 in words is "two hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-two".