1122021121 has 16 divisors (see below), whose sum is σ = 1276853760. Its totient is φ = 978120000.

The previous prime is 1122021091. The next prime is 1122021139. The reversal of 1122021121 is 1211202211.

It is a de Polignac number, because none of the positive numbers 2^k-1122021121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1122021151) 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, 130 + ... + 47371.

It is an arithmetic number, because the mean of its divisors is an integer number (79803360).

Almost surely, 2^1122021121 is an apocalyptic number.

It is an amenable number.

1122021121 is a deficient number, since it is larger than the sum of its proper divisors (154832639).

1122021121 is a wasteful number, since it uses less digits than its factorization.

1122021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47616.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1122021121 is about 33496.5837213290. The cubic root of 1122021121 is about 1039.1231270608.

Adding to 1122021121 its reverse (1211202211), we get a palindrome (2333223332).

The spelling of 1122021121 in words is "one billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-one".