202231323021 has 64 divisors (see below), whose sum is σ = 341351152128. Its totient is φ = 103631643648.

The previous prime is 202231322939. The next prime is 202231323031. The reversal of 202231323021 is 120323132202.

It is a happy number.

It is not a de Polignac number, because 202231323021 - 2⁷ = 202231322893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202231323031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6823591 + ... + 6853163.

It is an arithmetic number, because the mean of its divisors is an integer number (5333611752).

Almost surely, 2^202231323021 is an apocalyptic number.

202231323021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202231323021 is a deficient number, since it is larger than the sum of its proper divisors (139119829107).

202231323021 is a wasteful number, since it uses less digits than its factorization.

202231323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30310.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 202231323021 its reverse (120323132202), we get a palindrome (322554455223).

The spelling of 202231323021 in words is "two hundred two billion, two hundred thirty-one million, three hundred twenty-three thousand, twenty-one".