20120222221221 has 32 divisors (see below), whose sum is σ = 28670198400000. Its totient is φ = 12523138467840.

The previous prime is 20120222221219. The next prime is 20120222221223. The reversal of 20120222221221 is 12212222202102.

It is an interprime number because it is at equal distance from previous prime (20120222221219) and next prime (20120222221223).

It is not a de Polignac number, because 20120222221221 - 2¹ = 20120222221219 is a prime.

It is a super-2 number, since 2×20120222221221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120222221223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382075 + ... + 6355031.

It is an arithmetic number, because the mean of its divisors is an integer number (895943700000).

Almost surely, 2^{20120222221221} is an apocalyptic number.

It is an amenable number.

20120222221221 is a deficient number, since it is larger than the sum of its proper divisors (8549976178779).

20120222221221 is a wasteful number, since it uses less digits than its factorization.

20120222221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974269.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20120222221221 its reverse (12212222202102), we get a palindrome (32332444423323).

The spelling of 20120222221221 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".