142440121155 has 16 divisors (see below), whose sum is σ = 228303339264. Its totient is φ = 75835016160.

The previous prime is 142440121049. The next prime is 142440121157. The reversal of 142440121155 is 551121044241.

It is not a de Polignac number, because 142440121155 - 2⁷ = 142440121027 is a prime.

It is a super-2 number, since 2×142440121155² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142440121157) 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, 8306679 + ... + 8323808.

It is an arithmetic number, because the mean of its divisors is an integer number (14268958704).

Almost surely, 2^142440121155 is an apocalyptic number.

142440121155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142440121155 is a deficient number, since it is larger than the sum of its proper divisors (85863218109).

142440121155 is a wasteful number, since it uses less digits than its factorization.

142440121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16631066.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 142440121155 its reverse (551121044241), we get a palindrome (693561165396).

The spelling of 142440121155 in words is "one hundred forty-two billion, four hundred forty million, one hundred twenty-one thousand, one hundred fifty-five".