102000121000 has 64 divisors (see below), whose sum is σ = 238727857680. Its totient is φ = 40791916800.

The previous prime is 102000120967. The next prime is 102000121001. The reversal of 102000121000 is 121000201.

It can be written as a sum of positive squares in 8 ways, for example, as 20817295524 + 81182825476 = 144282^2 + 284926^2 .

It is not an unprimeable number, because it can be changed into a prime (102000121001) 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, 9007342 + ... + 9018658.

Almost surely, 2^102000121000 is an apocalyptic number.

102000121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102000121000 is an abundant number, since it is smaller than the sum of its proper divisors (136727736680).

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

102000121000 is a wasteful number, since it uses less digits than its factorization.

102000121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20351 (or 20337 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 102000121000 its reverse (121000201), we get a palindrome (102121121201).

The spelling of 102000121000 in words is "one hundred two billion, one hundred twenty-one thousand".