20211111212 has 96 divisors (see below), whose sum is σ = 37794955968. Its totient is φ = 9446400000.

The previous prime is 20211111211. The next prime is 20211111247. The reversal of 20211111212 is 21211111202.

It is not an unprimeable number, because it can be changed into a prime (20211111211) 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, 83863412 + ... + 83863652.

It is an arithmetic number, because the mean of its divisors is an integer number (393697458).

Almost surely, 2^20211111212 is an apocalyptic number.

It is an amenable number.

20211111212 is a deficient number, since it is larger than the sum of its proper divisors (17583844756).

20211111212 is a wasteful number, since it uses less digits than its factorization.

20211111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20211111212 its reverse (21211111202), we get a palindrome (41422222414).

The spelling of 20211111212 in words is "twenty billion, two hundred eleven million, one hundred eleven thousand, two hundred twelve".