11311202120 has 16 divisors (see below), whose sum is σ = 25450204860. Its totient is φ = 4524480832.

The previous prime is 11311202117. The next prime is 11311202143. The reversal of 11311202120 is 2120211311.

It can be written as a sum of positive squares in 2 ways, for example, as 11291612644 + 19589476 = 106262^2 + 4426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11311202095 and 11311202104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141389987 + ... + 141390066.

Almost surely, 2^11311202120 is an apocalyptic number.

11311202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311202120 is an abundant number, since it is smaller than the sum of its proper divisors (14139002740).

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

11311202120 is a wasteful number, since it uses less digits than its factorization.

11311202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282780064 (or 282780060 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11311202120 its reverse (2120211311), we get a palindrome (13431413431).

The spelling of 11311202120 in words is "eleven billion, three hundred eleven million, two hundred two thousand, one hundred twenty".