10621661121 has 6 divisors (see below), whose sum is σ = 15342399410. Its totient is φ = 7081107408.

The previous prime is 10621661093. The next prime is 10621661147. The reversal of 10621661121 is 12116612601.

10621661121 is a `hidden beast` number, since 1 + 0 + 6 + 21 + 6 + 611 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9190098225 + 1431562896 = 95865^2 + 37836^2 .

It is not a de Polignac number, because 10621661121 - 2¹¹ = 10621659073 is a prime.

It is a super-2 number, since 2×10621661121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10621661021) 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, 590092276 + ... + 590092293.

Almost surely, 2^10621661121 is an apocalyptic number.

It is an amenable number.

10621661121 is a deficient number, since it is larger than the sum of its proper divisors (4720738289).

10621661121 is a wasteful number, since it uses less digits than its factorization.

10621661121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180184575 (or 1180184572 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 10621661121 in words is "ten billion, six hundred twenty-one million, six hundred sixty-one thousand, one hundred twenty-one".