61000111101 has 4 divisors (see below), whose sum is σ = 81333481472. Its totient is φ = 40666740732.

The previous prime is 61000111061. The next prime is 61000111111. The reversal of 61000111101 is 10111100016.

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 not a de Polignac number, because 61000111101 - 2⁶ = 61000111037 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 (61000111111) 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, 10166685181 + ... + 10166685186.

It is an arithmetic number, because the mean of its divisors is an integer number (20333370368).

Almost surely, 2^61000111101 is an apocalyptic number.

It is an amenable number.

61000111101 is a deficient number, since it is larger than the sum of its proper divisors (20333370371).

61000111101 is a wasteful number, since it uses less digits than its factorization.

61000111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20333370370.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 61000111101 its reverse (10111100016), we get a palindrome (71111211117).

The spelling of 61000111101 in words is "sixty-one billion, one hundred eleven thousand, one hundred one".