10115051221 has 32 divisors (see below), whose sum is σ = 11879457408. Its totient is φ = 8510576640.

The previous prime is 10115051213. The next prime is 10115051257. The reversal of 10115051221 is 12215051101.

It is not a de Polignac number, because 10115051221 - 2³ = 10115051213 is a prime.

It is a super-2 number, since 2×10115051221² (a number of 21 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 (10115051291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3614995 + ... + 3617791.

It is an arithmetic number, because the mean of its divisors is an integer number (371233044).

Almost surely, 2^10115051221 is an apocalyptic number.

10115051221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10115051221 is a deficient number, since it is larger than the sum of its proper divisors (1764406187).

10115051221 is a wasteful number, since it uses less digits than its factorization.

10115051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141.

The product of its (nonzero) digits is 100, while the sum is 19.

The spelling of 10115051221 in words is "ten billion, one hundred fifteen million, fifty-one thousand, two hundred twenty-one".