202201010021 has 4 divisors (see below), whose sum is σ = 202204327200. Its totient is φ = 202197692844.

The previous prime is 202201009993. The next prime is 202201010023. The reversal of 202201010021 is 120010102202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120010102202 = 2 ⋅60005051101.

It is a cyclic number.

It is not a de Polignac number, because 202201010021 - 2¹⁴ = 202200993637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202201009984 and 202201010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202201010023) 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, 1565411 + ... + 1689648.

It is an arithmetic number, because the mean of its divisors is an integer number (50551081800).

Almost surely, 2^202201010021 is an apocalyptic number.

It is an amenable number.

202201010021 is a deficient number, since it is larger than the sum of its proper divisors (3317179).

202201010021 is an equidigital number, since it uses as much as digits as its factorization.

202201010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317178.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202201010021 its reverse (120010102202), we get a palindrome (322211112223).

The spelling of 202201010021 in words is "two hundred two billion, two hundred one million, ten thousand, twenty-one".