221021000110220 has 48 divisors (see below), whose sum is σ = 468635560394400. Its totient is φ = 87553425851904.

The previous prime is 221021000110147. The next prime is 221021000110231. The reversal of 221021000110220 is 22011000120122.

It is a junction number, because it is equal to n+sod(n) for n = 221021000110195 and 221021000110204.

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, 10411979 + ... + 23461698.

It is an arithmetic number, because the mean of its divisors is an integer number (9763240841550).

Almost surely, 2^{221021000110220} is an apocalyptic number.

221021000110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021000110220 is an abundant number, since it is smaller than the sum of its proper divisors (247614560284180).

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

221021000110220 is a wasteful number, since it uses less digits than its factorization.

221021000110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33876842 (or 33876840 counting only the distinct ones).

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

Adding to 221021000110220 its reverse (22011000120122), we get a palindrome (243032000230342).

The spelling of 221021000110220 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred ten thousand, two hundred twenty".