211222221220122 has 64 divisors (see below), whose sum is σ = 485601748807680. Its totient is φ = 59998218508224.

The previous prime is 211222221220099. The next prime is 211222221220159. The reversal of 211222221220122 is 221022122222112.

It is a happy number.

It is a super-2 number, since 2×211222221220122² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222221220092 and 211222221220101.

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, 208195279 + ... + 209207357.

It is an arithmetic number, because the mean of its divisors is an integer number (7587527325120).

Almost surely, 2^{211222221220122} is an apocalyptic number.

211222221220122 is an abundant number, since it is smaller than the sum of its proper divisors (274379527587558).

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

211222221220122 is a wasteful number, since it uses less digits than its factorization.

211222221220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040987.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 211222221220122 its reverse (221022122222112), we get a palindrome (432244343442234).

The spelling of 211222221220122 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".