221002202001021 has 192 divisors, whose sum is σ = 378366237849600. Its totient is φ = 113962551091200.

The previous prime is 221002202001017. The next prime is 221002202001029. The reversal of 221002202001021 is 120100202200122.

221002202001021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221002202001021 - 2² = 221002202001017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002202001029) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14974056040 + ... + 14974070798.

It is an arithmetic number, because the mean of its divisors is an integer number (1970657488800).

Almost surely, 2^{221002202001021} is an apocalyptic number.

221002202001021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221002202001021 is a deficient number, since it is larger than the sum of its proper divisors (157364035848579).

221002202001021 is a wasteful number, since it uses less digits than its factorization.

221002202001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17920 (or 17913 counting only the distinct ones).

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

Adding to 221002202001021 its reverse (120100202200122), we get a palindrome (341102404201143).

The spelling of 221002202001021 in words is "two hundred twenty-one trillion, two billion, two hundred two million, one thousand, twenty-one".