10511001621 has 12 divisors (see below), whose sum is σ = 16075649772. Its totient is φ = 6595138176.

The previous prime is 10511001619. The next prime is 10511001629. The reversal of 10511001621 is 12610011501.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9208513521 + 1302488100 = 95961^2 + 36090^2 .

It is not a de Polignac number, because 10511001621 - 2¹ = 10511001619 is a prime.

It is a super-2 number, since 2×10511001621² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10511001594 and 10511001603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10511001629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34349526 + ... + 34349831.

It is an arithmetic number, because the mean of its divisors is an integer number (1339637481).

Almost surely, 2^10511001621 is an apocalyptic number.

It is an amenable number.

10511001621 is a deficient number, since it is larger than the sum of its proper divisors (5564648151).

10511001621 is a wasteful number, since it uses less digits than its factorization.

10511001621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68699380 (or 68699377 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The spelling of 10511001621 in words is "ten billion, five hundred eleven million, one thousand, six hundred twenty-one".