222002121020021 has 4 divisors (see below), whose sum is σ = 222002539572000. Its totient is φ = 222001702468044.

The previous prime is 222002121019937. The next prime is 222002121020027. The reversal of 222002121020021 is 120020121200222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222002121020021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002121020027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208479371 + ... + 209541528.

It is an arithmetic number, because the mean of its divisors is an integer number (55500634893000).

Almost surely, 2^{222002121020021} is an apocalyptic number.

It is an amenable number.

222002121020021 is a deficient number, since it is larger than the sum of its proper divisors (418551979).

222002121020021 is an equidigital number, since it uses as much as digits as its factorization.

222002121020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418551978.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222002121020021 its reverse (120020121200222), we get a palindrome (342022242220243).

The spelling of 222002121020021 in words is "two hundred twenty-two trillion, two billion, one hundred twenty-one million, twenty thousand, twenty-one".