2121113156 has 6 divisors (see below), whose sum is σ = 3711948030. Its totient is φ = 1060556576.

The previous prime is 2121113131. The next prime is 2121113177. The reversal of 2121113156 is 6513111212.

It can be written as a sum of positive squares in only one way, i.e., 2026440256 + 94672900 = 45016^2 + 9730^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265139141 + ... + 265139148.

It is an arithmetic number, because the mean of its divisors is an integer number (618658005).

Almost surely, 2^2121113156 is an apocalyptic number.

It is an amenable number.

2121113156 is a deficient number, since it is larger than the sum of its proper divisors (1590834874).

2121113156 is a wasteful number, since it uses less digits than its factorization.

2121113156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530278293 (or 530278291 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 2121113156 is about 46055.5442482227. The cubic root of 2121113156 is about 1284.8564604210.

Adding to 2121113156 its reverse (6513111212), we get a palindrome (8634224368).

The spelling of 2121113156 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred fifty-six".