1051721637113 has 16 divisors (see below), whose sum is σ = 1242944679936. Its totient is φ = 870846178320.

The previous prime is 1051721637041. The next prime is 1051721637137. The reversal of 1051721637113 is 3117361271501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051721637113 is a prime.

It is a super-2 number, since 2×1051721637113² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051721637313) 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, 4182131 + ... + 4426472.

It is an arithmetic number, because the mean of its divisors is an integer number (77684042496).

Almost surely, 2^{1051721637113} is an apocalyptic number.

It is an amenable number.

1051721637113 is a deficient number, since it is larger than the sum of its proper divisors (191223042823).

1051721637113 is an equidigital number, since it uses as much as digits as its factorization.

1051721637113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8609204.

The product of its (nonzero) digits is 26460, while the sum is 38.

The spelling of 1051721637113 in words is "one trillion, fifty-one billion, seven hundred twenty-one million, six hundred thirty-seven thousand, one hundred thirteen".