142155213121 has 4 divisors (see below), whose sum is σ = 142165267200. Its totient is φ = 142145159044.

The previous prime is 142155213091. The next prime is 142155213131. The reversal of 142155213121 is 121312551241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142155213121 - 2⁷ = 142155212993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142155213121.

It is not an unprimeable number, because it can be changed into a prime (142155213131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005801 + ... + 5034118.

It is an arithmetic number, because the mean of its divisors is an integer number (35541316800).

Almost surely, 2^142155213121 is an apocalyptic number.

It is an amenable number.

142155213121 is a deficient number, since it is larger than the sum of its proper divisors (10054079).

142155213121 is a wasteful number, since it uses less digits than its factorization.

142155213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054078.

The product of its digits is 2400, while the sum is 28.

Adding to 142155213121 its reverse (121312551241), we get a palindrome (263467764362).

The spelling of 142155213121 in words is "one hundred forty-two billion, one hundred fifty-five million, two hundred thirteen thousand, one hundred twenty-one".