2112051655221 has 4 divisors (see below), whose sum is σ = 2816068873632. Its totient is φ = 1408034436812.

The previous prime is 2112051655199. The next prime is 2112051655229. The reversal of 2112051655221 is 1225561502112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2112051655221 - 2⁶ = 2112051655157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112051655229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352008609201 + ... + 352008609206.

It is an arithmetic number, because the mean of its divisors is an integer number (704017218408).

Almost surely, 2^{2112051655221} is an apocalyptic number.

It is an amenable number.

2112051655221 is a deficient number, since it is larger than the sum of its proper divisors (704017218411).

2112051655221 is an equidigital number, since it uses as much as digits as its factorization.

2112051655221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704017218410.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 2112051655221 in words is "two trillion, one hundred twelve billion, fifty-one million, six hundred fifty-five thousand, two hundred twenty-one".