142131121 has 4 divisors (see below), whose sum is σ = 155052144. Its totient is φ = 129210100.

The previous prime is 142131083. The next prime is 142131127. The reversal of 142131121 is 121131241.

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 142131121 - 2⁷ = 142130993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142131095 and 142131104.

It is not an unprimeable number, because it can be changed into a prime (142131127) 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, 6460495 + ... + 6460516.

It is an arithmetic number, because the mean of its divisors is an integer number (38763036).

Almost surely, 2^142131121 is an apocalyptic number.

142131121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142131121 is a deficient number, since it is larger than the sum of its proper divisors (12921023).

142131121 is a wasteful number, since it uses less digits than its factorization.

142131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12921022.

The product of its digits is 48, while the sum is 16.

The square root of 142131121 is about 11921.8757332896. The cubic root of 142131121 is about 521.8708754667.

Adding to 142131121 its reverse (121131241), we get a palindrome (263262362).

The spelling of 142131121 in words is "one hundred forty-two million, one hundred thirty-one thousand, one hundred twenty-one".