211220133131 has 8 divisors (see below), whose sum is σ = 241403802624. Its totient is φ = 181038804840.

The previous prime is 211220133097. The next prime is 211220133161. The reversal of 211220133131 is 131331022112.

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 not a de Polignac number, because 211220133131 - 2³⁰ = 210146391307 is a prime.

It is a super-2 number, since 2×211220133131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211220133161) 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, 387515 + ... + 756708.

It is an arithmetic number, because the mean of its divisors is an integer number (30175475328).

Almost surely, 2^211220133131 is an apocalyptic number.

211220133131 is a deficient number, since it is larger than the sum of its proper divisors (30183669493).

211220133131 is a wasteful number, since it uses less digits than its factorization.

211220133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170601.

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

Adding to 211220133131 its reverse (131331022112), we get a palindrome (342551155243).

The spelling of 211220133131 in words is "two hundred eleven billion, two hundred twenty million, one hundred thirty-three thousand, one hundred thirty-one".