222002001221021 has 4 divisors (see below), whose sum is σ = 253716572824032. Its totient is φ = 190287429618012.

The previous prime is 222002001220943. The next prime is 222002001221029. The reversal of 222002001221021 is 120122100200222.

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 222002001221021 - 2¹⁴ = 222002001204637 is a prime.

It is a super-2 number, since 2×222002001221021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002001221029) 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, 15857285801495 + ... + 15857285801508.

It is an arithmetic number, because the mean of its divisors is an integer number (63429143206008).

Almost surely, 2^{222002001221021} is an apocalyptic number.

It is an amenable number.

222002001221021 is a deficient number, since it is larger than the sum of its proper divisors (31714571603011).

222002001221021 is an equidigital number, since it uses as much as digits as its factorization.

222002001221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31714571603010.

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

Adding to 222002001221021 its reverse (120122100200222), we get a palindrome (342124101421243).

The spelling of 222002001221021 in words is "two hundred twenty-two trillion, two billion, one million, two hundred twenty-one thousand, twenty-one".