142169362121 has 4 divisors (see below), whose sum is σ = 142183341972. Its totient is φ = 142155382272.

The previous prime is 142169362087. The next prime is 142169362151. The reversal of 142169362121 is 121263961241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121263961241 = 151 ⋅803072591.

It can be written as a sum of positive squares in 2 ways, for example, as 68288142400 + 73881219721 = 261320^2 + 271811^2 .

It is a cyclic number.

It is not a de Polignac number, because 142169362121 - 2¹⁰ = 142169361097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142169362151) 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, 6974660 + ... + 6995013.

It is an arithmetic number, because the mean of its divisors is an integer number (35545835493).

Almost surely, 2^142169362121 is an apocalyptic number.

It is an amenable number.

142169362121 is a deficient number, since it is larger than the sum of its proper divisors (13979851).

142169362121 is a wasteful number, since it uses less digits than its factorization.

142169362121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13979850.

The product of its digits is 31104, while the sum is 38.

The spelling of 142169362121 in words is "one hundred forty-two billion, one hundred sixty-nine million, three hundred sixty-two thousand, one hundred twenty-one".