2122398621 has 24 divisors (see below), whose sum is σ = 3569754240. Its totient is φ = 1189914336.

The previous prime is 2122398617. The next prime is 2122398637. The reversal of 2122398621 is 1268932212.

It is a happy number.

2122398621 is a `hidden beast` number, since 2 + 1 + 2 + 23 + 9 + 8 + 621 = 666.

It is not a de Polignac number, because 2122398621 - 2² = 2122398617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122398671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314481 + ... + 321158.

It is an arithmetic number, because the mean of its divisors is an integer number (148739760).

Almost surely, 2^2122398621 is an apocalyptic number.

2122398621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2122398621 is a deficient number, since it is larger than the sum of its proper divisors (1447355619).

2122398621 is a wasteful number, since it uses less digits than its factorization.

2122398621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635705 (or 635702 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2122398621 is about 46069.4977289746. The cubic root of 2122398621 is about 1285.1159632310.

The spelling of 2122398621 in words is "two billion, one hundred twenty-two million, three hundred ninety-eight thousand, six hundred twenty-one".