102031131142 has 4 divisors (see below), whose sum is σ = 153046696716. Its totient is φ = 51015565570.

The previous prime is 102031131121. The next prime is 102031131149. The reversal of 102031131142 is 241131130201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102031131149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25507782784 + ... + 25507782787.

It is an arithmetic number, because the mean of its divisors is an integer number (38261674179).

Almost surely, 2^102031131142 is an apocalyptic number.

102031131142 is a deficient number, since it is larger than the sum of its proper divisors (51015565574).

102031131142 is an equidigital number, since it uses as much as digits as its factorization.

102031131142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51015565573.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102031131142 its reverse (241131130201), we get a palindrome (343162261343).

The spelling of 102031131142 in words is "one hundred two billion, thirty-one million, one hundred thirty-one thousand, one hundred forty-two".