102120001000 has 32 divisors (see below), whose sum is σ = 238960804680. Its totient is φ = 40848000000.

The previous prime is 102120000991. The next prime is 102120001051. The reversal of 102120001000 is 100021201.

It can be written as a sum of positive squares in 4 ways, for example, as 51549886116 + 50570114884 = 227046^2 + 224878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51059001 + ... + 51061000.

Almost surely, 2^102120001000 is an apocalyptic number.

102120001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120001000 is an abundant number, since it is smaller than the sum of its proper divisors (136840803680).

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

102120001000 is a wasteful number, since it uses less digits than its factorization.

102120001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102120022 (or 102120008 counting only the distinct ones).

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

Adding to 102120001000 its reverse (100021201), we get a palindrome (102220022201).

The spelling of 102120001000 in words is "one hundred two billion, one hundred twenty million, one thousand".