1156121022 has 32 divisors (see below), whose sum is σ = 2648570112. Its totient is φ = 329569344.

The previous prime is 1156121017. The next prime is 1156121033. The reversal of 1156121022 is 2201216511.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1156121022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12463 + ... + 49674.

It is an arithmetic number, because the mean of its divisors is an integer number (82767816).

Almost surely, 2^1156121022 is an apocalyptic number.

1156121022 is an abundant number, since it is smaller than the sum of its proper divisors (1492449090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156121022 is a wasteful number, since it uses less digits than its factorization.

1156121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62592.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1156121022 is about 34001.7796887163. The cubic root of 1156121022 is about 1049.5450854756.

Adding to 1156121022 its reverse (2201216511), we get a palindrome (3357337533).

The spelling of 1156121022 in words is "one billion, one hundred fifty-six million, one hundred twenty-one thousand, twenty-two".