20201201131 has 4 divisors (see below), whose sum is σ = 20241685000. Its totient is φ = 20160717264.

The previous prime is 20201201113. The next prime is 20201201149. The reversal of 20201201131 is 13110210202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13110210202 = 2 ⋅6555105101.

It is an interprime number because it is at equal distance from previous prime (20201201113) and next prime (20201201149).

It is a cyclic number.

It is not a de Polignac number, because 20201201131 - 2³³ = 11611266539 is a prime.

It is a super-2 number, since 2×20201201131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201201161) 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, 20241186 + ... + 20242183.

It is an arithmetic number, because the mean of its divisors is an integer number (5060421250).

Almost surely, 2^20201201131 is an apocalyptic number.

20201201131 is a deficient number, since it is larger than the sum of its proper divisors (40483869).

20201201131 is an equidigital number, since it uses as much as digits as its factorization.

20201201131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40483868.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20201201131 its reverse (13110210202), we get a palindrome (33311411333).

The spelling of 20201201131 in words is "twenty billion, two hundred one million, two hundred one thousand, one hundred thirty-one".