22231213212122 has 4 divisors (see below), whose sum is σ = 33346819818186. Its totient is φ = 11115606606060.

The previous prime is 22231213212119. The next prime is 22231213212133. The reversal of 22231213212122 is 22121231213222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22228480954681 + 2732257441 = 4714709^2 + 52271^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22231213212091 and 22231213212100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557803303029 + ... + 5557803303032.

Almost surely, 2^{22231213212122} is an apocalyptic number.

22231213212122 is a deficient number, since it is larger than the sum of its proper divisors (11115606606064).

22231213212122 is a wasteful number, since it uses less digits than its factorization.

22231213212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115606606063.

The product of its digits is 2304, while the sum is 26.

Adding to 22231213212122 its reverse (22121231213222), we get a palindrome (44352444425344).

The spelling of 22231213212122 in words is "twenty-two trillion, two hundred thirty-one billion, two hundred thirteen million, two hundred twelve thousand, one hundred twenty-two".