21201221012214 has 16 divisors (see below), whose sum is σ = 42403548990960. Its totient is φ = 7066889176320.

The previous prime is 21201221012071. The next prime is 21201221012233. The reversal of 21201221012214 is 41221012210212.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45874519 + ... + 46334370.

It is an arithmetic number, because the mean of its divisors is an integer number (2650221811935).

Almost surely, 2^{21201221012214} is an apocalyptic number.

21201221012214 is an abundant number, since it is smaller than the sum of its proper divisors (21202327978746).

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

21201221012214 is a wasteful number, since it uses less digits than its factorization.

21201221012214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92247215.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21201221012214 its reverse (41221012210212), we get a palindrome (62422233222426).

The spelling of 21201221012214 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-one million, twelve thousand, two hundred fourteen".