51110220101 has 4 divisors (see below), whose sum is σ = 51113222112. Its totient is φ = 51107218092.

The previous prime is 51110220079. The next prime is 51110220131. The reversal of 51110220101 is 10102201115.

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 not a de Polignac number, because 51110220101 - 2¹⁰ = 51110219077 is a prime.

It is a super-2 number, since 2×51110220101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51110220131) 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, 1475321 + ... + 1509566.

It is an arithmetic number, because the mean of its divisors is an integer number (12778305528).

Almost surely, 2^51110220101 is an apocalyptic number.

It is an amenable number.

51110220101 is a deficient number, since it is larger than the sum of its proper divisors (3002011).

51110220101 is a wasteful number, since it uses less digits than its factorization.

51110220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002010.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 51110220101 its reverse (10102201115), we get a palindrome (61212421216).

The spelling of 51110220101 in words is "fifty-one billion, one hundred ten million, two hundred twenty thousand, one hundred one".