211131202031 has 16 divisors (see below), whose sum is σ = 215601888960. Its totient is φ = 206705260800.

The previous prime is 211131202001. The next prime is 211131202069. The reversal of 211131202031 is 130202131112.

It is a cyclic number.

It is not a de Polignac number, because 211131202031 - 2¹⁰ = 211131201007 is a prime.

It is a super-2 number, since 2×211131202031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131202001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16450925 + ... + 16463753.

It is an arithmetic number, because the mean of its divisors is an integer number (13475118060).

Almost surely, 2^211131202031 is an apocalyptic number.

211131202031 is a deficient number, since it is larger than the sum of its proper divisors (4470686929).

211131202031 is a wasteful number, since it uses less digits than its factorization.

211131202031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14546.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211131202031 its reverse (130202131112), we get a palindrome (341333333143).

The spelling of 211131202031 in words is "two hundred eleven billion, one hundred thirty-one million, two hundred two thousand, thirty-one".