2120105556642 has 16 divisors (see below), whose sum is σ = 4293884672640. Its totient is φ = 697756258992.

The previous prime is 2120105556631. The next prime is 2120105556683. The reversal of 2120105556642 is 2466555010212.

It is a self number, because there is not a number n which added to its sum of digits gives 2120105556642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2236397793 + ... + 2236398740.

It is an arithmetic number, because the mean of its divisors is an integer number (268367792040).

Almost surely, 2^{2120105556642} is an apocalyptic number.

2120105556642 is an abundant number, since it is smaller than the sum of its proper divisors (2173779115998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2120105556642 is a wasteful number, since it uses less digits than its factorization.

2120105556642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472796617.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 2120105556642 in words is "two trillion, one hundred twenty billion, one hundred five million, five hundred fifty-six thousand, six hundred forty-two".