10551115221 has 4 divisors (see below), whose sum is σ = 14068153632. Its totient is φ = 7034076812.

The previous prime is 10551115219. The next prime is 10551115261. The reversal of 10551115221 is 12251115501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10551115221 - 2¹ = 10551115219 is a prime.

It is a super-2 number, since 2×10551115221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10551115191 and 10551115200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10551115261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758519201 + ... + 1758519206.

It is an arithmetic number, because the mean of its divisors is an integer number (3517038408).

Almost surely, 2^10551115221 is an apocalyptic number.

It is an amenable number.

10551115221 is a deficient number, since it is larger than the sum of its proper divisors (3517038411).

10551115221 is an equidigital number, since it uses as much as digits as its factorization.

10551115221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517038410.

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 10551115221 in words is "ten billion, five hundred fifty-one million, one hundred fifteen thousand, two hundred twenty-one".