51012151144021 has 16 divisors (see below), whose sum is σ = 51414441116544. Its totient is φ = 50610877297344.

The previous prime is 51012151143959. The next prime is 51012151144063. The reversal of 51012151144021 is 12044115121015.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51012151144021 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 (51012121144021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449575731 + ... + 449689183.

It is an arithmetic number, because the mean of its divisors is an integer number (3213402569784).

Almost surely, 2^{51012151144021} is an apocalyptic number.

It is an amenable number.

51012151144021 is a deficient number, since it is larger than the sum of its proper divisors (402289972523).

51012151144021 is a wasteful number, since it uses less digits than its factorization.

51012151144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117900.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 51012151144021 its reverse (12044115121015), we get a palindrome (63056266265036).

The spelling of 51012151144021 in words is "fifty-one trillion, twelve billion, one hundred fifty-one million, one hundred forty-four thousand, twenty-one".