221020101001212 has 48 divisors (see below), whose sum is σ = 560807760270240. Its totient is φ = 67465595215872.

The previous prime is 221020101001169. The next prime is 221020101001213. The reversal of 221020101001212 is 212100101020122.

221020101001212 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 = 221020101001191 and 221020101001200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020101001213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14640963637 + ... + 14640978732.

It is an arithmetic number, because the mean of its divisors is an integer number (11683495005630).

Almost surely, 2^{221020101001212} is an apocalyptic number.

It is an amenable number.

221020101001212 is an abundant number, since it is smaller than the sum of its proper divisors (339787659269028).

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

221020101001212 is a wasteful number, since it uses less digits than its factorization.

221020101001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29281942430 (or 29281942428 counting only the distinct ones).

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

Adding to 221020101001212 its reverse (212100101020122), we get a palindrome (433120202021334).

The spelling of 221020101001212 in words is "two hundred twenty-one trillion, twenty billion, one hundred one million, one thousand, two hundred twelve".