1122021142 has 12 divisors (see below), whose sum is σ = 1849944348. Its totient is φ = 510009500.

The previous prime is 1122021139. The next prime is 1122021149. The reversal of 1122021142 is 2411202211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122021149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2317984 + ... + 2318467.

It is an arithmetic number, because the mean of its divisors is an integer number (154162029).

Almost surely, 2^1122021142 is an apocalyptic number.

1122021142 is a deficient number, since it is larger than the sum of its proper divisors (727923206).

1122021142 is a wasteful number, since it uses less digits than its factorization.

1122021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636475 (or 4636464 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1122021142 is about 33496.5840347938. The cubic root of 1122021142 is about 1039.1231335437.

Adding to 1122021142 its reverse (2411202211), we get a palindrome (3533223353).

The spelling of 1122021142 in words is "one billion, one hundred twenty-two million, twenty-one thousand, one hundred forty-two".