202022001 has 6 divisors (see below), whose sum is σ = 291809570. Its totient is φ = 134681328.

The previous prime is 202021993. The next prime is 202022011. The reversal of 202022001 is 100220202.

It can be written as a sum of positive squares in only one way, i.e., 121022001 + 81000000 = 11001^2 + 9000^2 .

It is not a de Polignac number, because 202022001 - 2³ = 202021993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 22446889 = 202022001 / (2 + 0 + 2 + 0 + 2 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202022011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11223436 + ... + 11223453.

Almost surely, 2^202022001 is an apocalyptic number.

It is an amenable number.

202022001 is a deficient number, since it is larger than the sum of its proper divisors (89787569).

202022001 is a wasteful number, since it uses less digits than its factorization.

202022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22446895 (or 22446892 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 202022001 is about 14213.4443749571. Note that the first 3 decimals coincide. The cubic root of 202022001 is about 586.7677320647.

Adding to 202022001 its reverse (100220202), we get a palindrome (302242203).

The spelling of 202022001 in words is "two hundred two million, twenty-two thousand, one".