222100021120021 has 4 divisors (see below), whose sum is σ = 242290932130944. Its totient is φ = 201909110109100.

The previous prime is 222100021119997. The next prime is 222100021120073. The reversal of 222100021120021 is 120021120001222.

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 not a de Polignac number, because 222100021120021 - 2⁴⁷ = 81362532764693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222100021119977 and 222100021120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100021120091) 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, 10095455505445 + ... + 10095455505466.

It is an arithmetic number, because the mean of its divisors is an integer number (60572733032736).

Almost surely, 2^{222100021120021} is an apocalyptic number.

It is an amenable number.

222100021120021 is a deficient number, since it is larger than the sum of its proper divisors (20190911010923).

222100021120021 is a wasteful number, since it uses less digits than its factorization.

222100021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20190911010922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222100021120021 its reverse (120021120001222), we get a palindrome (342121141121243).

The spelling of 222100021120021 in words is "two hundred twenty-two trillion, one hundred billion, twenty-one million, one hundred twenty thousand, twenty-one".