222222002001021 has 96 divisors (see below), whose sum is σ = 375493966848000. Its totient is φ = 125214009667200.

The previous prime is 222222002001019. The next prime is 222222002001031. The reversal of 222222002001021 is 120100200222222.

222222002001021 is a `hidden beast` number, since 2 + 222 + 220 + 0 + 200 + 1 + 0 + 21 = 666.

It is not a de Polignac number, because 222222002001021 - 2¹ = 222222002001019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222222002000985 and 222222002001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222002001031) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48165460 + ... + 52577138.

It is an arithmetic number, because the mean of its divisors is an integer number (3911395488000).

Almost surely, 2^{222222002001021} is an apocalyptic number.

It is an amenable number.

222222002001021 is a deficient number, since it is larger than the sum of its proper divisors (153271964846979).

222222002001021 is a wasteful number, since it uses less digits than its factorization.

222222002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412215 (or 4412212 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222222002001021 its reverse (120100200222222), we get a palindrome (342322202223243).

The spelling of 222222002001021 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two million, one thousand, twenty-one".