201023081131 has 8 divisors (see below), whose sum is σ = 201227757120. Its totient is φ = 200818462152.

The previous prime is 201023081123. The next prime is 201023081137. The reversal of 201023081131 is 131180320102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201023081131 - 2³ = 201023081123 is a prime.

It is a super-2 number, since 2×201023081131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201023081137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11531740 + ... + 11549158.

It is an arithmetic number, because the mean of its divisors is an integer number (25153469640).

Almost surely, 2^201023081131 is an apocalyptic number.

201023081131 is a deficient number, since it is larger than the sum of its proper divisors (204675989).

201023081131 is a wasteful number, since it uses less digits than its factorization.

201023081131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28505.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 201023081131 in words is "two hundred one billion, twenty-three million, eighty-one thousand, one hundred thirty-one".