210120101000 has 32 divisors (see below), whose sum is σ = 491681038680. Its totient is φ = 84048040000.

The previous prime is 210120100969. The next prime is 210120101057. The reversal of 210120101000 is 101021012.

It can be written as a sum of positive squares in 4 ways, for example, as 118552130596 + 91567970404 = 344314^2 + 302602^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 105059051 + ... + 105061050.

Almost surely, 2^210120101000 is an apocalyptic number.

210120101000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210120101000 is an abundant number, since it is smaller than the sum of its proper divisors (281560937680).

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

210120101000 is a wasteful number, since it uses less digits than its factorization.

210120101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210120122 (or 210120108 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 210120101000 its reverse (101021012), we get a palindrome (210221122012).

The spelling of 210120101000 in words is "two hundred ten billion, one hundred twenty million, one hundred one thousand".