221221032132212 has 48 divisors (see below), whose sum is σ = 442709512664832. Its totient is φ = 94751718458880.

The previous prime is 221221032132197. The next prime is 221221032132241. The reversal of 221221032132212 is 212231230122122.

It is a congruent number.

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, 356617388 + ... + 357237180.

It is an arithmetic number, because the mean of its divisors is an integer number (9223114847184).

Almost surely, 2^{221221032132212} is an apocalyptic number.

It is an amenable number.

221221032132212 is an abundant number, since it is smaller than the sum of its proper divisors (221488480532620).

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

221221032132212 is a wasteful number, since it uses less digits than its factorization.

221221032132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627488 (or 627486 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 221221032132212 its reverse (212231230122122), we get a palindrome (433452262254334).

The spelling of 221221032132212 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, thirty-two million, one hundred thirty-two thousand, two hundred twelve".