11142421155 has 24 divisors (see below), whose sum is σ = 20028848112. Its totient is φ = 5942623968.

The previous prime is 11142421141. The next prime is 11142421187. The reversal of 11142421155 is 55112424111.

It is not a de Polignac number, because 11142421155 - 2¹⁰ = 11142420131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4584144 + ... + 4586573.

It is an arithmetic number, because the mean of its divisors is an integer number (834535338).

Almost surely, 2^11142421155 is an apocalyptic number.

11142421155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11142421155 is a deficient number, since it is larger than the sum of its proper divisors (8886426957).

11142421155 is an frugal number, since it uses more digits than its factorization.

11142421155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9170737 (or 9170725 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

Adding to 11142421155 its reverse (55112424111), we get a palindrome (66254845266).

The spelling of 11142421155 in words is "eleven billion, one hundred forty-two million, four hundred twenty-one thousand, one hundred fifty-five".