11331220222131 has 4 divisors (see below), whose sum is σ = 15108293629512. Its totient is φ = 7554146814752.

The previous prime is 11331220222117. The next prime is 11331220222159. The reversal of 11331220222131 is 13122202213311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11331220222131 - 2¹⁵ = 11331220189363 is a prime.

It is a super-2 number, since 2×11331220222131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11331220272131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888536703686 + ... + 1888536703691.

It is an arithmetic number, because the mean of its divisors is an integer number (3777073407378).

Almost surely, 2^{11331220222131} is an apocalyptic number.

11331220222131 is a deficient number, since it is larger than the sum of its proper divisors (3777073407381).

11331220222131 is an equidigital number, since it uses as much as digits as its factorization.

11331220222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777073407380.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 11331220222131 its reverse (13122202213311), we get a palindrome (24453422435442).

The spelling of 11331220222131 in words is "eleven trillion, three hundred thirty-one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred thirty-one".