1121373021 has 8 divisors (see below), whose sum is σ = 1495355904. Its totient is φ = 747486080.

The previous prime is 1121373017. The next prime is 1121373031. The reversal of 1121373021 is 1203731211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121373021 - 2² = 1121373017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121373031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10285 + ... + 48461.

It is an arithmetic number, because the mean of its divisors is an integer number (186919488).

Almost surely, 2^1121373021 is an apocalyptic number.

It is an amenable number.

1121373021 is a deficient number, since it is larger than the sum of its proper divisors (373982883).

1121373021 is an equidigital number, since it uses as much as digits as its factorization.

1121373021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47971.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1121373021 is about 33486.9082030575. The cubic root of 1121373021 is about 1038.9230163278.

The spelling of 1121373021 in words is "one billion, one hundred twenty-one million, three hundred seventy-three thousand, twenty-one".