2121292801 has 4 divisors (see below), whose sum is σ = 2121439572. Its totient is φ = 2121146032.

The previous prime is 2121292787. The next prime is 2121292889. The reversal of 2121292801 is 1082921212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1894338576 + 226954225 = 43524^2 + 15065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121292801 - 2²¹ = 2119195649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121292801.

It is not an unprimeable number, because it can be changed into a prime (2121298801) 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, 49006 + ... + 81511.

It is an arithmetic number, because the mean of its divisors is an integer number (530359893).

Almost surely, 2^2121292801 is an apocalyptic number.

It is an amenable number.

2121292801 is a deficient number, since it is larger than the sum of its proper divisors (146771).

2121292801 is a wasteful number, since it uses less digits than its factorization.

2121292801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146770.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 2121292801 is about 46057.4945150081. The cubic root of 2121292801 is about 1284.8927324954.

The spelling of 2121292801 in words is "two billion, one hundred twenty-one million, two hundred ninety-two thousand, eight hundred one".