2122211012221 has 4 divisors (see below), whose sum is σ = 2122213946944. Its totient is φ = 2122208077500.

The previous prime is 2122211012213. The next prime is 2122211012267. The reversal of 2122211012221 is 1222101122212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2122211012221 - 2³ = 2122211012213 is a prime.

It is a super-2 number, since 2×2122211012221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122211012921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469846 + ... + 2113096.

It is an arithmetic number, because the mean of its divisors is an integer number (530553486736).

Almost surely, 2^{2122211012221} is an apocalyptic number.

It is an amenable number.

2122211012221 is a deficient number, since it is larger than the sum of its proper divisors (2934723).

2122211012221 is a wasteful number, since it uses less digits than its factorization.

2122211012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934722.

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

Adding to 2122211012221 its reverse (1222101122212), we get a palindrome (3344312134433).

The spelling of 2122211012221 in words is "two trillion, one hundred twenty-two billion, two hundred eleven million, twelve thousand, two hundred twenty-one".