222012221021 has 8 divisors (see below), whose sum is σ = 235231593984. Its totient is φ = 208810607040.

The previous prime is 222012221009. The next prime is 222012221023. The reversal of 222012221021 is 120122210222.

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 222012221021 - 2³⁴ = 204832351837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222012221023) 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, 4413995 + ... + 4464008.

It is an arithmetic number, because the mean of its divisors is an integer number (29403949248).

Almost surely, 2^222012221021 is an apocalyptic number.

It is an amenable number.

222012221021 is a deficient number, since it is larger than the sum of its proper divisors (13219372963).

222012221021 is a wasteful number, since it uses less digits than its factorization.

222012221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8879491.

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

Adding to 222012221021 its reverse (120122210222), we get a palindrome (342134431243).

The spelling of 222012221021 in words is "two hundred twenty-two billion, twelve million, two hundred twenty-one thousand, twenty-one".