102000121020 has 96 divisors (see below), whose sum is σ = 362667110400. Its totient is φ = 23314312512.

The previous prime is 102000121009. The next prime is 102000121021. The reversal of 102000121020 is 20121000201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102000120993 and 102000121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000121021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13488300 + ... + 13495859.

It is an arithmetic number, because the mean of its divisors is an integer number (3777782400).

Almost surely, 2^102000121020 is an apocalyptic number.

102000121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102000121020 is an abundant number, since it is smaller than the sum of its proper divisors (260666989380).

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

102000121020 is a wasteful number, since it uses less digits than its factorization.

102000121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26984184 (or 26984176 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102000121020 its reverse (20121000201), we get a palindrome (122121121221).

The spelling of 102000121020 in words is "one hundred two billion, one hundred twenty-one thousand, twenty".