61100100012 has 48 divisors (see below), whose sum is σ = 162945692672. Its totient is φ = 17455875840.

The previous prime is 61100100011. The next prime is 61100100043. The reversal of 61100100012 is 21000100116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (61100100011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2161812 + ... + 2189892.

Almost surely, 2^61100100012 is an apocalyptic number.

It is an amenable number.

61100100012 is an abundant number, since it is smaller than the sum of its proper divisors (101845592660).

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

61100100012 is a wasteful number, since it uses less digits than its factorization.

61100100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53998 (or 53996 counting only the distinct ones).

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

Adding to 61100100012 its reverse (21000100116), we get a palindrome (82100200128).

The spelling of 61100100012 in words is "sixty-one billion, one hundred million, one hundred thousand, twelve".