122211121221 has 32 divisors (see below), whose sum is σ = 207065606400. Its totient is φ = 69785210880.

The previous prime is 122211121213. The next prime is 122211121229. The reversal of 122211121221 is 122121112221.

It is an interprime number because it is at equal distance from previous prime (122211121213) and next prime (122211121229).

It is not a de Polignac number, because 122211121221 - 2³ = 122211121213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122211121194 and 122211121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211121229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36841 + ... + 495761.

It is an arithmetic number, because the mean of its divisors is an integer number (6470800200).

Almost surely, 2^122211121221 is an apocalyptic number.

It is an amenable number.

122211121221 is a deficient number, since it is larger than the sum of its proper divisors (84854485179).

122211121221 is a wasteful number, since it uses less digits than its factorization.

122211121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460346 (or 460340 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 122211121221 its reverse (122121112221), we get a palindrome (244332233442).

The spelling of 122211121221 in words is "one hundred twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".