21003322220212 has 12 divisors (see below), whose sum is σ = 36755896340800. Its totient is φ = 10501637551416.

The previous prime is 21003322220149. The next prime is 21003322220281. The reversal of 21003322220212 is 21202222330012.

It is a super-2 number, since 2×21003322220212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3801462 + ... + 7513837.

Almost surely, 2^{21003322220212} is an apocalyptic number.

It is an amenable number.

21003322220212 is a deficient number, since it is larger than the sum of its proper divisors (15752574120588).

21003322220212 is a wasteful number, since it uses less digits than its factorization.

21003322220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11779350 (or 11779348 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21003322220212 its reverse (21202222330012), we get a palindrome (42205544550224).

The spelling of 21003322220212 in words is "twenty-one trillion, three billion, three hundred twenty-two million, two hundred twenty thousand, two hundred twelve".