1115072157421 has 16 divisors (see below), whose sum is σ = 1154669932800. Its totient is φ = 1075551499008.

The previous prime is 1115072157401. The next prime is 1115072157431. The reversal of 1115072157421 is 1247512705111.

It is a cyclic number.

It is not a de Polignac number, because 1115072157421 - 2⁵ = 1115072157389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115072157401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163425016 + ... + 163431838.

It is an arithmetic number, because the mean of its divisors is an integer number (72166870800).

Almost surely, 2^{1115072157421} is an apocalyptic number.

It is an amenable number.

1115072157421 is a deficient number, since it is larger than the sum of its proper divisors (39597775379).

1115072157421 is a wasteful number, since it uses less digits than its factorization.

1115072157421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11628.

The product of its (nonzero) digits is 19600, while the sum is 37.

The spelling of 1115072157421 in words is "one trillion, one hundred fifteen billion, seventy-two million, one hundred fifty-seven thousand, four hundred twenty-one".