55012116721 has 8 divisors (see below), whose sum is σ = 55679581440. Its totient is φ = 54344763312.

The previous prime is 55012116641. The next prime is 55012116737. The reversal of 55012116721 is 12761121055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55012116721 - 2¹¹ = 55012114673 is a prime.

It is a super-2 number, since 2×55012116721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55012716721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1419520 + ... + 1457758.

It is an arithmetic number, because the mean of its divisors is an integer number (6959947680).

Almost surely, 2^55012116721 is an apocalyptic number.

It is an amenable number.

55012116721 is a deficient number, since it is larger than the sum of its proper divisors (667464719).

55012116721 is a wasteful number, since it uses less digits than its factorization.

55012116721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55655.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 55012116721 its reverse (12761121055), we get a palindrome (67773237776).

The spelling of 55012116721 in words is "fifty-five billion, twelve million, one hundred sixteen thousand, seven hundred twenty-one".