20211000221212 has 24 divisors (see below), whose sum is σ = 37233087091200. Its totient is φ = 9573040972656.

The previous prime is 20211000221207. The next prime is 20211000221213. The reversal of 20211000221212 is 21212200011202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211000221213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6963262 + ... + 9429157.

It is an arithmetic number, because the mean of its divisors is an integer number (1551378628800).

Almost surely, 2^{20211000221212} is an apocalyptic number.

It is an amenable number.

20211000221212 is a deficient number, since it is larger than the sum of its proper divisors (17022086869988).

20211000221212 is a wasteful number, since it uses less digits than its factorization.

20211000221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16408665 (or 16408663 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211000221212 its reverse (21212200011202), we get a palindrome (41423200232414).

The spelling of 20211000221212 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one thousand, two hundred twelve".