11211320131 has 8 divisors (see below), whose sum is σ = 12235393728. Its totient is φ = 10188057000.

The previous prime is 11211320117. The next prime is 11211320137. The reversal of 11211320131 is 13102311211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11211320131 - 2²¹ = 11209222979 is a prime.

It is a super-2 number, since 2×11211320131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211320137) 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, 173505 + ... + 229186.

It is an arithmetic number, because the mean of its divisors is an integer number (1529424216).

Almost surely, 2^11211320131 is an apocalyptic number.

11211320131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11211320131 is a deficient number, since it is larger than the sum of its proper divisors (1024073597).

11211320131 is a wasteful number, since it uses less digits than its factorization.

11211320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405233.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11211320131 its reverse (13102311211), we get a palindrome (24313631342).

The spelling of 11211320131 in words is "eleven billion, two hundred eleven million, three hundred twenty thousand, one hundred thirty-one".