142108023981 has 64 divisors (see below), whose sum is σ = 250061137920. Its totient is φ = 69619011840.

The previous prime is 142108023931. The next prime is 142108024001. The reversal of 142108023981 is 189320801241.

It is not a de Polignac number, because 142108023981 - 2⁷ = 142108023853 is a prime.

It is a super-2 number, since 2×142108023981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142108023931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41391 + ... + 534723.

It is an arithmetic number, because the mean of its divisors is an integer number (3907205280).

Almost surely, 2^142108023981 is an apocalyptic number.

142108023981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142108023981 is a deficient number, since it is larger than the sum of its proper divisors (107953113939).

142108023981 is a wasteful number, since it uses less digits than its factorization.

142108023981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493426.

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 142108023981 in words is "one hundred forty-two billion, one hundred eight million, twenty-three thousand, nine hundred eighty-one".