105211551060621 has 6 divisors (see below), whose sum is σ = 151972240420910. Its totient is φ = 70141034040408.

The previous prime is 105211551060611. The next prime is 105211551060769. The reversal of 105211551060621 is 126060155112501.

105211551060621 is a `hidden beast` number, since 1 + 0 + 5 + 2 + 1 + 15 + 5 + 10 + 6 + 0 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 103351846096521 + 1859704964100 = 10166211^2 + 1363710^2 .

It is a de Polignac number, because none of the positive numbers 2^k-105211551060621 is a prime.

It is a super-2 number, since 2×105211551060621² (a number of 29 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 (105211551060611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5845086170026 + ... + 5845086170043.

Almost surely, 2^{105211551060621} is an apocalyptic number.

It is an amenable number.

105211551060621 is a deficient number, since it is larger than the sum of its proper divisors (46760689360289).

105211551060621 is a wasteful number, since it uses less digits than its factorization.

105211551060621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11690172340075 (or 11690172340072 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 105211551060621 in words is "one hundred five trillion, two hundred eleven billion, five hundred fifty-one million, sixty thousand, six hundred twenty-one".