211313131021 has 8 divisors (see below), whose sum is σ = 212154588288. Its totient is φ = 210472128000.

The previous prime is 211313130983. The next prime is 211313131033. The reversal of 211313131021 is 120131313112.

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 211313131021 - 2¹⁹ = 211312606733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211313131021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313131061) 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, 834381 + ... + 1057741.

It is an arithmetic number, because the mean of its divisors is an integer number (26519323536).

Almost surely, 2^211313131021 is an apocalyptic number.

It is an amenable number.

211313131021 is a deficient number, since it is larger than the sum of its proper divisors (841457267).

211313131021 is a wasteful number, since it uses less digits than its factorization.

211313131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227123.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 211313131021 its reverse (120131313112), we get a palindrome (331444444133).

The spelling of 211313131021 in words is "two hundred eleven billion, three hundred thirteen million, one hundred thirty-one thousand, twenty-one".