1142021121 has 16 divisors (see below), whose sum is σ = 1664275968. Its totient is φ = 693446400.

The previous prime is 1142021107. The next prime is 1142021141. The reversal of 1142021121 is 1211202411.

It is not a de Polignac number, because 1142021121 - 2²⁷ = 1007803393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1142021121.

It is not an unprimeable number, because it can be changed into a prime (1142021141) 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, 359590 + ... + 362751.

It is an arithmetic number, because the mean of its divisors is an integer number (104017248).

Almost surely, 2^1142021121 is an apocalyptic number.

It is an amenable number.

1142021121 is a deficient number, since it is larger than the sum of its proper divisors (522254847).

1142021121 is a wasteful number, since it uses less digits than its factorization.

1142021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722392.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1142021121 is about 33793.8029969993. The cubic root of 1142021121 is about 1045.2609166638.

Adding to 1142021121 its reverse (1211202411), we get a palindrome (2353223532).

The spelling of 1142021121 in words is "one billion, one hundred forty-two million, twenty-one thousand, one hundred twenty-one".