222070021 has 4 divisors (see below), whose sum is σ = 223765344. Its totient is φ = 220374700.

The previous prime is 222070003. The next prime is 222070039. The reversal of 222070021 is 120070222.

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 an interprime number because it is at equal distance from previous prime (222070003) and next prime (222070039).

It is a cyclic number.

It is not a de Polignac number, because 222070021 - 2⁵ = 222069989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222069977 and 222070004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222070091) 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, 847465 + ... + 847726.

It is an arithmetic number, because the mean of its divisors is an integer number (55941336).

Almost surely, 2^222070021 is an apocalyptic number.

It is an amenable number.

222070021 is a deficient number, since it is larger than the sum of its proper divisors (1695323).

222070021 is a wasteful number, since it uses less digits than its factorization.

222070021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695322.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 222070021 is about 14902.0139914040. The cubic root of 222070021 is about 605.5685487073.

The spelling of 222070021 in words is "two hundred twenty-two million, seventy thousand, twenty-one".