222121111210021 has 8 divisors (see below), whose sum is σ = 231799009970880. Its totient is φ = 212444917377792.

The previous prime is 222121111209997. The next prime is 222121111210043. The reversal of 222121111210021 is 120012111121222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222121111210021 - 2³³ = 222112521275429 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 (222121111210081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425965915 + ... + 426487048.

It is an arithmetic number, because the mean of its divisors is an integer number (28974876246360).

Almost surely, 2^{222121111210021} is an apocalyptic number.

It is an amenable number.

222121111210021 is a deficient number, since it is larger than the sum of its proper divisors (9677898760859).

222121111210021 is a wasteful number, since it uses less digits than its factorization.

222121111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852464315.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222121111210021 its reverse (120012111121222), we get a palindrome (342133222331243).

The spelling of 222121111210021 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred ten thousand, twenty-one".