142101121 has 4 divisors (see below), whose sum is σ = 145567044. Its totient is φ = 138635200.

The previous prime is 142101103. The next prime is 142101137. The reversal of 142101121 is 121101241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121101241 = 1601 ⋅75641.

It can be written as a sum of positive squares in 2 ways, for example, as 79121025 + 62980096 = 8895^2 + 7936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142101121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142101221) 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, 1732900 + ... + 1732981.

It is an arithmetic number, because the mean of its divisors is an integer number (36391761).

Almost surely, 2^142101121 is an apocalyptic number.

It is an amenable number.

142101121 is a deficient number, since it is larger than the sum of its proper divisors (3465923).

142101121 is an equidigital number, since it uses as much as digits as its factorization.

142101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465922.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 142101121 is about 11920.6174756176. The cubic root of 142101121 is about 521.8341553175.

Adding to 142101121 its reverse (121101241), we get a palindrome (263202362).

The spelling of 142101121 in words is "one hundred forty-two million, one hundred one thousand, one hundred twenty-one".