2120105554421 has 16 divisors (see below), whose sum is σ = 2194219560960. Its totient is φ = 2047599751680.

The previous prime is 2120105554337. The next prime is 2120105554423. The reversal of 2120105554421 is 1244555010212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120105554421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120105554423) 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, 659201 + ... + 2162118.

It is an arithmetic number, because the mean of its divisors is an integer number (137138722560).

Almost surely, 2^{2120105554421} is an apocalyptic number.

It is an amenable number.

2120105554421 is a deficient number, since it is larger than the sum of its proper divisors (74114006539).

2120105554421 is a wasteful number, since it uses less digits than its factorization.

2120105554421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821604.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 2120105554421 in words is "two trillion, one hundred twenty billion, one hundred five million, five hundred fifty-four thousand, four hundred twenty-one".