2122342021 has 2 divisors, whose sum is σ = 2122342022.
Its totient is φ = 2122342020.
The previous prime is 2122341983. The next prime is 2122342037. The reversal of 2122342021 is 1202432212.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1649496996 + 472845025 = 40614^2 + 21745^2
It is a cyclic number.
It is not a de Polignac number, because 2122342021 - 29 = 2122341509 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 2122342021.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2122342051) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061171010 + 1061171011.
It is an arithmetic number, because the mean of its divisors is an integer number (1061171011).
Almost surely, 22122342021 is an apocalyptic number.
It is an amenable number.
2122342021 is a deficient number, since it is larger than the sum of its proper divisors (1).
2122342021 is an equidigital number, since it uses as much as digits as its factorization.
2122342021 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 384, while the sum is 19.
The square root of 2122342021 is about 46068.8834355685.
The cubic root of 2122342021 is about 1285.1045393308.
Adding to 2122342021 its reverse (1202432212), we get a palindrome (3324774233).
The spelling of 2122342021 in words is "two billion, one hundred twenty-two million, three hundred forty-two thousand, twenty-one".