51011001101 has 16 divisors (see below), whose sum is σ = 52909561920. Its totient is φ = 49155361920.

The previous prime is 51011001043. The next prime is 51011001109. The reversal of 51011001101 is 10110011015.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51011001101 - 2¹⁰ = 51011000077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011001109) 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, 665711 + ... + 738371.

It is an arithmetic number, because the mean of its divisors is an integer number (3306847620).

Almost surely, 2^51011001101 is an apocalyptic number.

It is an amenable number.

51011001101 is a deficient number, since it is larger than the sum of its proper divisors (1898560819).

51011001101 is a wasteful number, since it uses less digits than its factorization.

51011001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72956.

The product of its (nonzero) digits is 5, while the sum is 11.

Adding to 51011001101 its reverse (10110011015), we get a palindrome (61121012116).

It can be divided in two parts, 5 and 1011001101, that multiplied together give a palindrome (5055005505).

The spelling of 51011001101 in words is "fifty-one billion, eleven million, one thousand, one hundred one".