22121221221022 has 16 divisors (see below), whose sum is σ = 41369556569472. Its totient is φ = 8618657618520.

The previous prime is 22121221221019. The next prime is 22121221221067. The reversal of 22121221221022 is 22012212212122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22121221220984 and 22121221221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71822146668 + ... + 71822146975.

It is an arithmetic number, because the mean of its divisors is an integer number (2585597285592).

Almost surely, 2^{22121221221022} is an apocalyptic number.

22121221221022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22121221221022 is a deficient number, since it is larger than the sum of its proper divisors (19248335348450).

22121221221022 is a wasteful number, since it uses less digits than its factorization.

22121221221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143644293663.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22121221221022 its reverse (22012212212122), we get a palindrome (44133433433144).

The spelling of 22121221221022 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-two".