202011202201021 has 4 divisors (see below), whose sum is σ = 202011335017632. Its totient is φ = 202011069384412.

The previous prime is 202011202200953. The next prime is 202011202201057. The reversal of 202011202201021 is 120102202110202.

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 202011202201021 - 2¹⁵ = 202011202168253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202011202200986 and 202011202201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202011202201091) 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, 64100095 + ... + 67177708.

It is an arithmetic number, because the mean of its divisors is an integer number (50502833754408).

Almost surely, 2^{202011202201021} is an apocalyptic number.

It is an amenable number.

202011202201021 is a deficient number, since it is larger than the sum of its proper divisors (132816611).

202011202201021 is a wasteful number, since it uses less digits than its factorization.

202011202201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132816610.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202011202201021 its reverse (120102202110202), we get a palindrome (322113404311223).

The spelling of 202011202201021 in words is "two hundred two trillion, eleven billion, two hundred two million, two hundred one thousand, twenty-one".