102140120542 has 24 divisors (see below), whose sum is σ = 162250486776. Its totient is φ = 48216935664.

The previous prime is 102140120441. The next prime is 102140120543. The reversal of 102140120542 is 245021041201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102140120543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29868 + ... + 452959.

It is an arithmetic number, because the mean of its divisors is an integer number (6760436949).

Almost surely, 2^102140120542 is an apocalyptic number.

102140120542 is a deficient number, since it is larger than the sum of its proper divisors (60110366234).

102140120542 is a wasteful number, since it uses less digits than its factorization.

102140120542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483160 (or 483141 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 102140120542 its reverse (245021041201), we get a palindrome (347161161743).

The spelling of 102140120542 in words is "one hundred two billion, one hundred forty million, one hundred twenty thousand, five hundred forty-two".