202123110021331 has 4 divisors (see below), whose sum is σ = 202404227004000. Its totient is φ = 201841993038664.

The previous prime is 202123110021319. The next prime is 202123110021347. The reversal of 202123110021331 is 133120011321202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202123110021331 - 2²⁹ = 202122573150419 is a prime.

It is a super-2 number, since 2×202123110021331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202123110021361) 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, 140558490256 + ... + 140558491693.

It is an arithmetic number, because the mean of its divisors is an integer number (50601056751000).

Almost surely, 2^{202123110021331} is an apocalyptic number.

202123110021331 is a deficient number, since it is larger than the sum of its proper divisors (281116982669).

202123110021331 is an equidigital number, since it uses as much as digits as its factorization.

202123110021331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281116982668.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 202123110021331 its reverse (133120011321202), we get a palindrome (335243121342533).

The spelling of 202123110021331 in words is "two hundred two trillion, one hundred twenty-three billion, one hundred ten million, twenty-one thousand, three hundred thirty-one".