122222010001221 has 24 divisors (see below), whose sum is σ = 190125355379960. Its totient is φ = 75212662928256.

The previous prime is 122222010001211. The next prime is 122222010001283. The reversal of 122222010001221 is 122100010222221.

It is a happy number.

122222010001221 is a `hidden beast` number, since 1 + 222 + 220 + 1 + 0 + 0 + 0 + 1 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 549837080100 + 121672172921121 = 741510^2 + 11030511^2 .

It is not a de Polignac number, because 122222010001221 - 2⁹ = 122222010000709 is a prime.

It is a super-2 number, since 2×122222010001221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122222010001194 and 122222010001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222010001211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3971475 + ... + 16131231.

Almost surely, 2^{122222010001221} is an apocalyptic number.

It is an amenable number.

122222010001221 is a deficient number, since it is larger than the sum of its proper divisors (67903345378739).

122222010001221 is a wasteful number, since it uses less digits than its factorization.

122222010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12245685 (or 12245682 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122222010001221 its reverse (122100010222221), we get a palindrome (244322020223442).

The spelling of 122222010001221 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, ten million, one thousand, two hundred twenty-one".