221001330101212 has 24 divisors (see below), whose sum is σ = 403660505847312. Its totient is φ = 105771460329600.

The previous prime is 221001330101039. The next prime is 221001330101219. The reversal of 221001330101212 is 212101033100122.

It is a self number, because there is not a number n which added to its sum of digits gives 221001330101212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001330101219) 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, 12712907214 + ... + 12712924597.

It is an arithmetic number, because the mean of its divisors is an integer number (16819187743638).

Almost surely, 2^{221001330101212} is an apocalyptic number.

It is an amenable number.

221001330101212 is a deficient number, since it is larger than the sum of its proper divisors (182659175746100).

221001330101212 is a wasteful number, since it uses less digits than its factorization.

221001330101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25425831909 (or 25425831907 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221001330101212 its reverse (212101033100122), we get a palindrome (433102363201334).

The spelling of 221001330101212 in words is "two hundred twenty-one trillion, one billion, three hundred thirty million, one hundred one thousand, two hundred twelve".