51101117020 has 24 divisors (see below), whose sum is σ = 113624837424. Its totient is φ = 19238067456.

The previous prime is 51101117009. The next prime is 51101117021. The reversal of 51101117020 is 2071110115.

It is a super-2 number, since 2×51101117020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101117021) 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, 75148362 + ... + 75149041.

It is an arithmetic number, because the mean of its divisors is an integer number (4734368226).

Almost surely, 2^51101117020 is an apocalyptic number.

It is an amenable number.

51101117020 is an abundant number, since it is smaller than the sum of its proper divisors (62523720404).

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

51101117020 is a wasteful number, since it uses less digits than its factorization.

51101117020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150297429 (or 150297427 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 19.

Adding to 51101117020 its reverse (2071110115), we get a palindrome (53172227135).

The spelling of 51101117020 in words is "fifty-one billion, one hundred one million, one hundred seventeen thousand, twenty".