221020110012212 has 48 divisors (see below), whose sum is σ = 444678566478720. Its totient is φ = 94157749268352.

The previous prime is 221020110012151. The next prime is 221020110012257. The reversal of 221020110012212 is 212210011020122.

It is a congruent number.

It is an unprimeable number.

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, 21634214 + ... + 30167522.

It is an arithmetic number, because the mean of its divisors is an integer number (9264136801640).

Almost surely, 2^{221020110012212} is an apocalyptic number.

It is an amenable number.

221020110012212 is an abundant number, since it is smaller than the sum of its proper divisors (223658456466508).

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

221020110012212 is a wasteful number, since it uses less digits than its factorization.

221020110012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538840 (or 8538838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221020110012212 its reverse (212210011020122), we get a palindrome (433230121032334).

The spelling of 221020110012212 in words is "two hundred twenty-one trillion, twenty billion, one hundred ten million, twelve thousand, two hundred twelve".