102123421434 has 96 divisors (see below), whose sum is σ = 237546503040. Its totient is φ = 32518620288.

The previous prime is 102123421429. The next prime is 102123421441. The reversal of 102123421434 is 434124321201.

102123421434 is a `hidden beast` number, since 10 + 212 + 3 + 4 + 2 + 1 + 434 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 102123421398 and 102123421407.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27621474 + ... + 27625170.

It is an arithmetic number, because the mean of its divisors is an integer number (2474442740).

Almost surely, 2^102123421434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102123421434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118773251520).

102123421434 is an abundant number, since it is smaller than the sum of its proper divisors (135423081606).

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

102123421434 is a wasteful number, since it uses less digits than its factorization.

102123421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721 (or 4692 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 102123421434 its reverse (434124321201), we get a palindrome (536247742635).

The spelling of 102123421434 in words is "one hundred two billion, one hundred twenty-three million, four hundred twenty-one thousand, four hundred thirty-four".