211221101022 has 32 divisors (see below), whose sum is σ = 438734426400. Its totient is φ = 67734425088.

The previous prime is 211221100963. The next prime is 211221101023. The reversal of 211221101022 is 220101122112.

It is a super-2 number, since 2×211221101022² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221100992 and 211221101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221101023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5325447 + ... + 5364962.

It is an arithmetic number, because the mean of its divisors is an integer number (13710450825).

Almost surely, 2^211221101022 is an apocalyptic number.

211221101022 is an abundant number, since it is smaller than the sum of its proper divisors (227513325378).

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

211221101022 is a wasteful number, since it uses less digits than its factorization.

211221101022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10690540.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211221101022 its reverse (220101122112), we get a palindrome (431322223134).

The spelling of 211221101022 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred one thousand, twenty-two".