1155423022421 has 16 divisors (see below), whose sum is σ = 1192155096000. Its totient is φ = 1119163747968.

The previous prime is 1155423022357. The next prime is 1155423022451. The reversal of 1155423022421 is 1242203245511.

It is a cyclic number.

It is not a de Polignac number, because 1155423022421 - 2⁶ = 1155423022357 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 (1155423022451) 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, 3820265 + ... + 4111601.

It is an arithmetic number, because the mean of its divisors is an integer number (74509693500).

Almost surely, 2^{1155423022421} is an apocalyptic number.

It is an amenable number.

1155423022421 is a deficient number, since it is larger than the sum of its proper divisors (36732073579).

1155423022421 is a wasteful number, since it uses less digits than its factorization.

1155423022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292148.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 1155423022421 its reverse (1242203245511), we get a palindrome (2397626267932).

The spelling of 1155423022421 in words is "one trillion, one hundred fifty-five billion, four hundred twenty-three million, twenty-two thousand, four hundred twenty-one".