11131121406 has 24 divisors (see below), whose sum is σ = 22818488472. Its totient is φ = 3619873600.

The previous prime is 11131121383. The next prime is 11131121429. The reversal of 11131121406 is 60412113111.

It is an interprime number because it is at equal distance from previous prime (11131121383) and next prime (11131121429).

It is a super-2 number, since 2×11131121406² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541725 + ... + 561896.

It is an arithmetic number, because the mean of its divisors is an integer number (950770353).

Almost surely, 2^11131121406 is an apocalyptic number.

11131121406 is an abundant number, since it is smaller than the sum of its proper divisors (11687367066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11131121406 is a wasteful number, since it uses less digits than its factorization.

11131121406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103708 (or 1103667 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11131121406 its reverse (60412113111), we get a palindrome (71543234517).

The spelling of 11131121406 in words is "eleven billion, one hundred thirty-one million, one hundred twenty-one thousand, four hundred six".