1121221013 has 8 divisors (see below), whose sum is σ = 1224024480. Its totient is φ = 1018563280.

The previous prime is 1121220967. The next prime is 1121221019. The reversal of 1121221013 is 3101221211.

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 1121221013 - 2⁶ = 1121220949 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 (1121221019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20018 + ... + 51411.

It is an arithmetic number, because the mean of its divisors is an integer number (153003060).

Almost surely, 2^1121221013 is an apocalyptic number.

It is an amenable number.

1121221013 is a deficient number, since it is larger than the sum of its proper divisors (102803467).

1121221013 is a wasteful number, since it uses less digits than its factorization.

1121221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72867.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1121221013 is about 33484.6384630326. The cubic root of 1121221013 is about 1038.8760703835.

Adding to 1121221013 its reverse (3101221211), we get a palindrome (4222442224).

The spelling of 1121221013 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, thirteen".