61121110012 has 6 divisors (see below), whose sum is σ = 106961942528. Its totient is φ = 30560555004.

The previous prime is 61121109947. The next prime is 61121110031. The reversal of 61121110012 is 21001112116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7640138748 + ... + 7640138755.

Almost surely, 2^61121110012 is an apocalyptic number.

It is an amenable number.

61121110012 is a deficient number, since it is larger than the sum of its proper divisors (45840832516).

61121110012 is a wasteful number, since it uses less digits than its factorization.

61121110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15280277507 (or 15280277505 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 61121110012 its reverse (21001112116), we get a palindrome (82122222128).

The spelling of 61121110012 in words is "sixty-one billion, one hundred twenty-one million, one hundred ten thousand, twelve".