2122020055561 has 16 divisors (see below), whose sum is σ = 2484384271488. Its totient is φ = 1774462896000.

The previous prime is 2122020055543. The next prime is 2122020055619. The reversal of 2122020055561 is 1655500202212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2122020055561 - 2¹⁷ = 2122019924489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2122020059561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13612686 + ... + 13767688.

It is an arithmetic number, because the mean of its divisors is an integer number (155274016968).

Almost surely, 2^{2122020055561} is an apocalyptic number.

It is an amenable number.

2122020055561 is a deficient number, since it is larger than the sum of its proper divisors (362364215927).

2122020055561 is a wasteful number, since it uses less digits than its factorization.

2122020055561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202752.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 2122020055561 its reverse (1655500202212), we get a palindrome (3777520257773).

The spelling of 2122020055561 in words is "two trillion, one hundred twenty-two billion, twenty million, fifty-five thousand, five hundred sixty-one".