202221300111021 has 24 divisors (see below), whose sum is σ = 293410016969784. Its totient is φ = 134208775895040.

The previous prime is 202221300111001. The next prime is 202221300111037. The reversal of 202221300111021 is 120111003122202.

It can be written as a sum of positive squares in 4 ways, for example, as 78477256670121 + 123744043440900 = 8858739^2 + 11124030^2 .

It is not a de Polignac number, because 202221300111021 - 2⁶ = 202221300110957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202221300110985 and 202221300111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221300111001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9653916 + ... + 22307861.

It is an arithmetic number, because the mean of its divisors is an integer number (12225417373741).

Almost surely, 2^{202221300111021} is an apocalyptic number.

It is an amenable number.

202221300111021 is a deficient number, since it is larger than the sum of its proper divisors (91188716858763).

202221300111021 is a wasteful number, since it uses less digits than its factorization.

202221300111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31964941 (or 31964938 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 202221300111021 its reverse (120111003122202), we get a palindrome (322332303233223).

The spelling of 202221300111021 in words is "two hundred two trillion, two hundred twenty-one billion, three hundred million, one hundred eleven thousand, twenty-one".