222221022121021 has 48 divisors (see below), whose sum is σ = 291267733680000. Its totient is φ = 168935839934400.

The previous prime is 222221022120953. The next prime is 222221022121061. The reversal of 222221022121021 is 120121220122222.

It is not a de Polignac number, because 222221022121021 - 2⁴⁷ = 81483533765693 is a prime.

It is a super-2 number, since 2×222221022121021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222221022120983 and 222221022121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221022121061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38878521 + ... + 44226478.

It is an arithmetic number, because the mean of its divisors is an integer number (6068077785000).

Almost surely, 2^{222221022121021} is an apocalyptic number.

It is an amenable number.

222221022121021 is a deficient number, since it is larger than the sum of its proper divisors (69046711558979).

222221022121021 is an equidigital number, since it uses as much as digits as its factorization.

222221022121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83105087 (or 83105058 counting only the distinct ones).

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

Adding to 222221022121021 its reverse (120121220122222), we get a palindrome (342342242243243).

The spelling of 222221022121021 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, twenty-one".