2021031231131 has 8 divisors (see below), whose sum is σ = 2204786141184. Its totient is φ = 1837280454120.

The previous prime is 2021031231059. The next prime is 2021031231187. The reversal of 2021031231131 is 1311321301202.

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 a de Polignac number, because none of the positive numbers 2^k-2021031231131 is a prime.

It is a super-2 number, since 2×2021031231131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021031236131) 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, 37430 + ... + 2010836.

It is an arithmetic number, because the mean of its divisors is an integer number (275598267648).

Almost surely, 2^{2021031231131} is an apocalyptic number.

2021031231131 is a deficient number, since it is larger than the sum of its proper divisors (183754910053).

2021031231131 is a wasteful number, since it uses less digits than its factorization.

2021031231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066521.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2021031231131 its reverse (1311321301202), we get a palindrome (3332352532333).

The spelling of 2021031231131 in words is "two trillion, twenty-one billion, thirty-one million, two hundred thirty-one thousand, one hundred thirty-one".