2161061411242 has 4 divisors (see below), whose sum is σ = 3241592116866. Its totient is φ = 1080530705620.

The previous prime is 2161061411231. The next prime is 2161061411273. The reversal of 2161061411242 is 2421141601612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1797152055241 + 363909356001 = 1340579^2 + 603249^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540265352809 + ... + 540265352812.

Almost surely, 2^{2161061411242} is an apocalyptic number.

2161061411242 is a deficient number, since it is larger than the sum of its proper divisors (1080530705624).

2161061411242 is a wasteful number, since it uses less digits than its factorization.

2161061411242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080530705623.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 2161061411242 in words is "two trillion, one hundred sixty-one billion, sixty-one million, four hundred eleven thousand, two hundred forty-two".