2122020055661 has 16 divisors (see below), whose sum is σ = 2338385296896. Its totient is φ = 1909572600000.

The previous prime is 2122020055657. The next prime is 2122020055681. The reversal of 2122020055661 is 1665500202212.

It is a cyclic number.

It is not a de Polignac number, because 2122020055661 - 2² = 2122020055657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122020055681) 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 15 ways as a sum of consecutive naturals, for example, 4695716 + ... + 5127746.

It is an arithmetic number, because the mean of its divisors is an integer number (146149081056).

Almost surely, 2^{2122020055661} is an apocalyptic number.

It is an amenable number.

2122020055661 is a deficient number, since it is larger than the sum of its proper divisors (216365241235).

2122020055661 is a wasteful number, since it uses less digits than its factorization.

2122020055661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436564.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 2122020055661 its reverse (1665500202212), we get a palindrome (3787520257873).

The spelling of 2122020055661 in words is "two trillion, one hundred twenty-two billion, twenty million, fifty-five thousand, six hundred sixty-one".