2122121240 has 16 divisors (see below), whose sum is σ = 4774772880. Its totient is φ = 848848480.

The previous prime is 2122121227. The next prime is 2122121279. The reversal of 2122121240 is 421212212.

It is a congruent number.

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, 26526476 + ... + 26526555.

It is an arithmetic number, because the mean of its divisors is an integer number (298423305).

Almost surely, 2^2122121240 is an apocalyptic number.

2122121240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122121240 is an abundant number, since it is smaller than the sum of its proper divisors (2652651640).

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

2122121240 is a wasteful number, since it uses less digits than its factorization.

2122121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53053042 (or 53053038 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2122121240 is about 46066.4871680053. The cubic root of 2122121240 is about 1285.0599759033.

Adding to 2122121240 its reverse (421212212), we get a palindrome (2543333452).

The spelling of 2122121240 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred forty".