210000101220 has 288 divisors, whose sum is σ = 800684172288. Its totient is φ = 43364837376.

The previous prime is 210000101161. The next prime is 210000101263. The reversal of 210000101220 is 22101000012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 633472 + ... + 906248.

It is an arithmetic number, because the mean of its divisors is an integer number (2780153376).

Almost surely, 2^210000101220 is an apocalyptic number.

210000101220 is a gapful number since it is divisible by the number (20) 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 210000101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400342086144).

210000101220 is an abundant number, since it is smaller than the sum of its proper divisors (590684071068).

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

210000101220 is a wasteful number, since it uses less digits than its factorization.

210000101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272859 (or 272854 counting only the distinct ones).

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

Adding to 210000101220 its reverse (22101000012), we get a palindrome (232101101232).

The spelling of 210000101220 in words is "two hundred ten billion, one hundred one thousand, two hundred twenty".