11102120031 has 4 divisors (see below), whose sum is σ = 14802826712. Its totient is φ = 7401413352.

The previous prime is 11102120023. The next prime is 11102120059. The reversal of 11102120031 is 13002120111.

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

It is not a de Polignac number, because 11102120031 - 2³ = 11102120023 is a prime.

It is a super-2 number, since 2×11102120031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11102119989 and 11102120016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102120021) 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, 1850353336 + ... + 1850353341.

It is an arithmetic number, because the mean of its divisors is an integer number (3700706678).

Almost surely, 2^11102120031 is an apocalyptic number.

11102120031 is a deficient number, since it is larger than the sum of its proper divisors (3700706681).

11102120031 is an equidigital number, since it uses as much as digits as its factorization.

11102120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700706680.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11102120031 its reverse (13002120111), we get a palindrome (24104240142).

The spelling of 11102120031 in words is "eleven billion, one hundred two million, one hundred twenty thousand, thirty-one".