51122101 has 4 divisors (see below), whose sum is σ = 51144652. Its totient is φ = 51099552.

The previous prime is 51122063. The next prime is 51122117. The reversal of 51122101 is 10122115.

51122101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26112100 + 25010001 = 5110^2 + 5001^2 .

It is a cyclic number.

It is not a de Polignac number, because 51122101 - 2¹⁷ = 50991029 is a prime.

It is a super-2 number, since 2×51122101² = 5226938421308402, which 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 (51122171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7440 + ... + 12553.

It is an arithmetic number, because the mean of its divisors is an integer number (12786163).

Almost surely, 2^51122101 is an apocalyptic number.

It is an amenable number.

51122101 is a deficient number, since it is larger than the sum of its proper divisors (22551).

51122101 is a wasteful number, since it uses less digits than its factorization.

51122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22550.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 51122101 is about 7149.9720978477. The cubic root of 51122101 is about 371.1386907211.

Adding to 51122101 its reverse (10122115), we get a palindrome (61244216).

The spelling of 51122101 in words is "fifty-one million, one hundred twenty-two thousand, one hundred one".