102121302042 has 32 divisors (see below), whose sum is σ = 226956729600. Its totient is φ = 34037358624.

The previous prime is 102121302037. The next prime is 102121302047. The reversal of 102121302042 is 240203121201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102121302037) and next prime (102121302047).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102121302047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562959 + ... + 721917.

It is an arithmetic number, because the mean of its divisors is an integer number (7092397800).

Almost surely, 2^102121302042 is an apocalyptic number.

102121302042 is an abundant number, since it is smaller than the sum of its proper divisors (124835427558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102121302042 is a wasteful number, since it uses less digits than its factorization.

102121302042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170867 (or 170861 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 102121302042 its reverse (240203121201), we get a palindrome (342324423243).

The spelling of 102121302042 in words is "one hundred two billion, one hundred twenty-one million, three hundred two thousand, forty-two".