2121113154 has 32 divisors (see below), whose sum is σ = 4498851456. Its totient is φ = 664398080.

The previous prime is 2121113131. The next prime is 2121113177. The reversal of 2121113154 is 4513111212.

It is an interprime number because it is at equal distance from previous prime (2121113131) and next prime (2121113177).

It is a self number, because there is not a number n which added to its sum of digits gives 2121113154.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49924 + ... + 82064.

It is an arithmetic number, because the mean of its divisors is an integer number (140589108).

Almost surely, 2^2121113154 is an apocalyptic number.

2121113154 is an abundant number, since it is smaller than the sum of its proper divisors (2377738302).

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

2121113154 is a wasteful number, since it uses less digits than its factorization.

2121113154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32810.

The product of its digits is 240, while the sum is 21.

The square root of 2121113154 is about 46055.5442265098. The cubic root of 2121113154 is about 1284.8564600172.

Adding to 2121113154 its reverse (4513111212), we get a palindrome (6634224366).

The spelling of 2121113154 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred fifty-four".