202020112021 has 12 divisors (see below), whose sum is σ = 253080141132. Its totient is φ = 159840088128.

The previous prime is 202020112009. The next prime is 202020112067. The reversal of 202020112021 is 120211020202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27221700100 + 174798411921 = 164990^2 + 418089^2 .

It is not a de Polignac number, because 202020112021 - 2⁵ = 202020111989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 202020111992 and 202020112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020112081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158570880 + ... + 158572153.

It is an arithmetic number, because the mean of its divisors is an integer number (21090011761).

Almost surely, 2^202020112021 is an apocalyptic number.

It is an amenable number.

202020112021 is a deficient number, since it is larger than the sum of its proper divisors (51060029111).

202020112021 is a wasteful number, since it uses less digits than its factorization.

202020112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317143060 (or 317143053 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202020112021 its reverse (120211020202), we get a palindrome (322231132223).

The spelling of 202020112021 in words is "two hundred two billion, twenty million, one hundred twelve thousand, twenty-one".