102121002000 has 240 divisors, whose sum is σ = 357104322432. Its totient is φ = 27199468800.

The previous prime is 102121001959. The next prime is 102121002089. The reversal of 102121002000 is 200121201.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17403067 + ... + 17408933.

Almost surely, 2^102121002000 is an apocalyptic number.

102121002000 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 102121002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178552161216).

102121002000 is an abundant number, since it is smaller than the sum of its proper divisors (254983320432).

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

102121002000 is a wasteful number, since it uses less digits than its factorization.

102121002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863 (or 6844 counting only the distinct ones).

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

Adding to 102121002000 its reverse (200121201), we get a palindrome (102321123201).

The spelling of 102121002000 in words is "one hundred two billion, one hundred twenty-one million, two thousand".