142987826121 has 24 divisors (see below), whose sum is σ = 229957481664. Its totient is φ = 77406939360.

The previous prime is 142987825993. The next prime is 142987826123. The reversal of 142987826121 is 121628789241.

It is not a de Polignac number, because 142987826121 - 2⁷ = 142987825993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142987826123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9423090 + ... + 9438251.

It is an arithmetic number, because the mean of its divisors is an integer number (9581561736).

Almost surely, 2^142987826121 is an apocalyptic number.

It is an amenable number.

142987826121 is a deficient number, since it is larger than the sum of its proper divisors (86969655543).

142987826121 is a wasteful number, since it uses less digits than its factorization.

142987826121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18861389 (or 18861370 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The spelling of 142987826121 in words is "one hundred forty-two billion, nine hundred eighty-seven million, eight hundred twenty-six thousand, one hundred twenty-one".