2122620851 has 4 divisors (see below), whose sum is σ = 2285899392. Its totient is φ = 1959342312.

The previous prime is 2122620839. The next prime is 2122620869. The reversal of 2122620851 is 1580262212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122620851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2122620811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81639251 + ... + 81639276.

It is an arithmetic number, because the mean of its divisors is an integer number (571474848).

Almost surely, 2^2122620851 is an apocalyptic number.

2122620851 is a deficient number, since it is larger than the sum of its proper divisors (163278541).

2122620851 is a wasteful number, since it uses less digits than its factorization.

2122620851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163278540.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 2122620851 is about 46071.9095653740. The cubic root of 2122620851 is about 1285.1608152129.

The spelling of 2122620851 in words is "two billion, one hundred twenty-two million, six hundred twenty thousand, eight hundred fifty-one".