210201110021220 has 48 divisors (see below), whose sum is σ = 588696964406208. Its totient is φ = 56040881115520.

The previous prime is 210201110021191. The next prime is 210201110021251. The reversal of 210201110021220 is 22120011102012.

210201110021220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×210201110021220³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 210201110021220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398115966 + ... + 398643605.

It is an arithmetic number, because the mean of its divisors is an integer number (12264520091796).

Almost surely, 2^{210201110021220} is an apocalyptic number.

210201110021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210201110021220 is an abundant number, since it is smaller than the sum of its proper divisors (378495854384988).

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

210201110021220 is a wasteful number, since it uses less digits than its factorization.

210201110021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796763980 (or 796763978 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210201110021220 its reverse (22120011102012), we get a palindrome (232321121123232).

The spelling of 210201110021220 in words is "two hundred ten trillion, two hundred one billion, one hundred ten million, twenty-one thousand, two hundred twenty".