102123230320020 has 768 divisors, whose sum is σ = 364807618560000. Its totient is φ = 20772878837760.

The previous prime is 102123230320019. The next prime is 102123230320057. The reversal of 102123230320020 is 20023032321201.

It is a happy number.

It is a super-2 number, since 2×102123230320020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 30955812331 + ... + 30955815629.

It is an arithmetic number, because the mean of its divisors is an integer number (475009920000).

Almost surely, 2^{102123230320020} is an apocalyptic number.

102123230320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102123230320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182403809280000).

102123230320020 is an abundant number, since it is smaller than the sum of its proper divisors (262684388239980).

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

102123230320020 is a wasteful number, since it uses less digits than its factorization.

102123230320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148 (or 5146 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 102123230320020 its reverse (20023032321201), we get a palindrome (122146262641221).

The spelling of 102123230320020 in words is "one hundred two trillion, one hundred twenty-three billion, two hundred thirty million, three hundred twenty thousand, twenty".