61110106621 has 4 divisors (see below), whose sum is σ = 62145871200. Its totient is φ = 60074342044.

The previous prime is 61110106597. The next prime is 61110106633. The reversal of 61110106621 is 12660101116.

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 a de Polignac number, because none of the positive numbers 2^k-61110106621 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 (61110106691) 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, 517882201 + ... + 517882318.

It is an arithmetic number, because the mean of its divisors is an integer number (15536467800).

Almost surely, 2^61110106621 is an apocalyptic number.

It is an amenable number.

61110106621 is a deficient number, since it is larger than the sum of its proper divisors (1035764579).

61110106621 is a wasteful number, since it uses less digits than its factorization.

61110106621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035764578.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 61110106621 its reverse (12660101116), we get a palindrome (73770207737).

The spelling of 61110106621 in words is "sixty-one billion, one hundred ten million, one hundred six thousand, six hundred twenty-one".