11213411981 has 16 divisors (see below), whose sum is σ = 11419626240. Its totient is φ = 11009476800.

The previous prime is 11213411971. The next prime is 11213411987. The reversal of 11213411981 is 18911431211.

It is a cyclic number.

It is not a de Polignac number, because 11213411981 - 2¹⁸ = 11213149837 is a prime.

It is a super-2 number, since 2×11213411981² (a number of 21 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 (11213411987) 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, 7540220 + ... + 7541706.

It is an arithmetic number, because the mean of its divisors is an integer number (713726640).

Almost surely, 2^11213411981 is an apocalyptic number.

It is an amenable number.

11213411981 is a deficient number, since it is larger than the sum of its proper divisors (206214259).

11213411981 is a wasteful number, since it uses less digits than its factorization.

11213411981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164.

The product of its digits is 1728, while the sum is 32.

The spelling of 11213411981 in words is "eleven billion, two hundred thirteen million, four hundred eleven thousand, nine hundred eighty-one".