210120220100 has 36 divisors (see below), whose sum is σ = 521098147584. Its totient is φ = 72041218080.

The previous prime is 210120220091. The next prime is 210120220109. The reversal of 210120220100 is 1022021012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (210120220091) and next prime (210120220109).

It is not an unprimeable number, because it can be changed into a prime (210120220109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150085172 + ... + 150086571.

It is an arithmetic number, because the mean of its divisors is an integer number (14474948544).

Almost surely, 2^210120220100 is an apocalyptic number.

210120220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210120220100 is an abundant number, since it is smaller than the sum of its proper divisors (310977927484).

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

210120220100 is a wasteful number, since it uses less digits than its factorization.

210120220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300171764 (or 300171757 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210120220100 its reverse (1022021012), we get a palindrome (211142241112).

The spelling of 210120220100 in words is "two hundred ten billion, one hundred twenty million, two hundred twenty thousand, one hundred".