2121292799 has 4 divisors (see below), whose sum is σ = 2142295800. Its totient is φ = 2100289800.

The previous prime is 2121292787. The next prime is 2121292889. The reversal of 2121292799 is 9972921212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121292799 - 2¹² = 2121288703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121292739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10501349 + ... + 10501550.

It is an arithmetic number, because the mean of its divisors is an integer number (535573950).

Almost surely, 2^2121292799 is an apocalyptic number.

2121292799 is a deficient number, since it is larger than the sum of its proper divisors (21003001).

2121292799 is a wasteful number, since it uses less digits than its factorization.

2121292799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21003000.

The product of its digits is 81648, while the sum is 44.

The square root of 2121292799 is about 46057.4944932961. The cubic root of 2121292799 is about 1284.8927320916.

The spelling of 2121292799 in words is "two billion, one hundred twenty-one million, two hundred ninety-two thousand, seven hundred ninety-nine".