221200210101020 has 24 divisors (see below), whose sum is σ = 479504971575168. Its totient is φ = 85625887780800.

The previous prime is 221200210100993. The next prime is 221200210101023. The reversal of 221200210101020 is 20101012002122.

221200210101020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221200210100986 and 221200210101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200210101023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178387265591 + ... + 178387266830.

It is an arithmetic number, because the mean of its divisors is an integer number (19979373815632).

Almost surely, 2^{221200210101020} is an apocalyptic number.

221200210101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200210101020 is an abundant number, since it is smaller than the sum of its proper divisors (258304761474148).

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

221200210101020 is a wasteful number, since it uses less digits than its factorization.

221200210101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356774532461 (or 356774532459 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221200210101020 its reverse (20101012002122), we get a palindrome (241301222103142).

The spelling of 221200210101020 in words is "two hundred twenty-one trillion, two hundred billion, two hundred ten million, one hundred one thousand, twenty".