221021020112010 has 32 divisors (see below), whose sum is σ = 530451335407680. Its totient is φ = 58938840125568.

The previous prime is 221021020111937. The next prime is 221021020112017. The reversal of 221021020112010 is 10211020120122.

It is a super-3 number, since 3×221021020112010³ (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 not an unprimeable number, because it can be changed into a prime (221021020112017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13059286 + ... + 24750494.

It is an arithmetic number, because the mean of its divisors is an integer number (16576604231490).

Almost surely, 2^{221021020112010} is an apocalyptic number.

221021020112010 is an abundant number, since it is smaller than the sum of its proper divisors (309430315295670).

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

221021020112010 is a wasteful number, since it uses less digits than its factorization.

221021020112010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12321382.

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

Adding to 221021020112010 its reverse (10211020120122), we get a palindrome (231232040232132).

The spelling of 221021020112010 in words is "two hundred twenty-one trillion, twenty-one billion, twenty million, one hundred twelve thousand, ten".