211133221131 has 48 divisors (see below), whose sum is σ = 341917796864. Its totient is φ = 113499933696.

The previous prime is 211133221127. The next prime is 211133221151. The reversal of 211133221131 is 131122331112.

It is not a de Polignac number, because 211133221131 - 2² = 211133221127 is a prime.

It is a super-2 number, since 2×211133221131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 211133221098 and 211133221107.

It is not an unprimeable number, because it can be changed into a prime (211133221111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16458786 + ... + 16471608.

Almost surely, 2^211133221131 is an apocalyptic number.

211133221131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211133221131 is a deficient number, since it is larger than the sum of its proper divisors (130784575733).

211133221131 is a wasteful number, since it uses less digits than its factorization.

211133221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15580 (or 15563 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 211133221131 its reverse (131122331112), we get a palindrome (342255552243).

The spelling of 211133221131 in words is "two hundred eleven billion, one hundred thirty-three million, two hundred twenty-one thousand, one hundred thirty-one".