2121020415 has 24 divisors (see below), whose sum is σ = 3803211360. Its totient is φ = 1092202944.

The previous prime is 2121020411. The next prime is 2121020423. The reversal of 2121020415 is 5140201212.

2121020415 is a `hidden beast` number, since 21 + 210 + 20 + 415 = 666.

It is not a de Polignac number, because 2121020415 - 2² = 2121020411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 811347 + ... + 813956.

It is an arithmetic number, because the mean of its divisors is an integer number (158467140).

Almost surely, 2^2121020415 is an apocalyptic number.

2121020415 is a deficient number, since it is larger than the sum of its proper divisors (1682190945).

2121020415 is a wasteful number, since it uses less digits than its factorization.

2121020415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625343 (or 1625340 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2121020415 is about 46054.5373986104. The cubic root of 2121020415 is about 1284.8377343087.

Adding to 2121020415 its reverse (5140201212), we get a palindrome (7261221627).

The spelling of 2121020415 in words is "two billion, one hundred twenty-one million, twenty thousand, four hundred fifteen".