221002021022001 has 4 divisors (see below), whose sum is σ = 294669361362672. Its totient is φ = 147334680681332.

The previous prime is 221002021021987. The next prime is 221002021022017. The reversal of 221002021022001 is 100220120200122.

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 221002021022001 - 2¹⁸ = 221002020759857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221002021022201) 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, 36833670170331 + ... + 36833670170336.

It is an arithmetic number, because the mean of its divisors is an integer number (73667340340668).

Almost surely, 2^{221002021022001} is an apocalyptic number.

It is an amenable number.

221002021022001 is a deficient number, since it is larger than the sum of its proper divisors (73667340340671).

221002021022001 is an equidigital number, since it uses as much as digits as its factorization.

221002021022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73667340340670.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221002021022001 its reverse (100220120200122), we get a palindrome (321222141222123).

The spelling of 221002021022001 in words is "two hundred twenty-one trillion, two billion, twenty-one million, twenty-two thousand, one".