2021011231131 has 6 divisors (see below), whose sum is σ = 2919238444980. Its totient is φ = 1347340820748.

The previous prime is 2021011231103. The next prime is 2021011231177. The reversal of 2021011231131 is 1311321101202.

2021011231131 is a `hidden beast` number, since 2 + 0 + 210 + 112 + 311 + 31 = 666.

It is not a de Polignac number, because 2021011231131 - 2⁹ = 2021011230619 is a prime.

It is a super-2 number, since 2×2021011231131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021011231181) 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, 112278401721 + ... + 112278401738.

It is an arithmetic number, because the mean of its divisors is an integer number (486539740830).

Almost surely, 2^{2021011231131} is an apocalyptic number.

2021011231131 is a deficient number, since it is larger than the sum of its proper divisors (898227213849).

2021011231131 is a wasteful number, since it uses less digits than its factorization.

2021011231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224556803465 (or 224556803462 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2021011231131 its reverse (1311321101202), we get a palindrome (3332332332333).

The spelling of 2021011231131 in words is "two trillion, twenty-one billion, eleven million, two hundred thirty-one thousand, one hundred thirty-one".