2122621791 has 8 divisors (see below), whose sum is σ = 2834889600. Its totient is φ = 1412717592.

The previous prime is 2122621789. The next prime is 2122621817. The reversal of 2122621791 is 1971262212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2122621791 - 2¹ = 2122621789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122621741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588805 + ... + 592398.

It is an arithmetic number, because the mean of its divisors is an integer number (354361200).

Almost surely, 2^2122621791 is an apocalyptic number.

2122621791 is a deficient number, since it is larger than the sum of its proper divisors (712267809).

2122621791 is a wasteful number, since it uses less digits than its factorization.

2122621791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181805.

The product of its digits is 6048, while the sum is 33.

The square root of 2122621791 is about 46071.9197668168. The cubic root of 2122621791 is about 1285.1610049235.

The spelling of 2122621791 in words is "two billion, one hundred twenty-two million, six hundred twenty-one thousand, seven hundred ninety-one".