122213221221 has 64 divisors (see below), whose sum is σ = 218091944448. Its totient is φ = 59032240128.

The previous prime is 122213221171. The next prime is 122213221253. The reversal of 122213221221 is 122122312221.

It is not a de Polignac number, because 122213221221 - 2²⁶ = 122146112357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

122213221221 is a modest number, since divided by 221221 gives 122213 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122213221621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 184140 + ... + 527573.

It is an arithmetic number, because the mean of its divisors is an integer number (3407686632).

Almost surely, 2^122213221221 is an apocalyptic number.

It is an amenable number.

122213221221 is a deficient number, since it is larger than the sum of its proper divisors (95878723227).

122213221221 is a wasteful number, since it uses less digits than its factorization.

122213221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711790.

The product of its digits is 384, while the sum is 21.

Adding to 122213221221 its reverse (122122312221), we get a palindrome (244335533442).

The spelling of 122213221221 in words is "one hundred twenty-two billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred twenty-one".