20211222012111 has 48 divisors (see below), whose sum is σ = 31585332778272. Its totient is φ = 12380117760000.

The previous prime is 20211222012067. The next prime is 20211222012139. The reversal of 20211222012111 is 11121022211202.

20211222012111 is a `hidden beast` number, since 20 + 211 + 2 + 220 + 1 + 211 + 1 = 666.

It is not a de Polignac number, because 20211222012111 - 2¹⁰ = 20211222011087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211222012011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45385371 + ... + 45828531.

It is an arithmetic number, because the mean of its divisors is an integer number (658027766214).

Almost surely, 2^{20211222012111} is an apocalyptic number.

20211222012111 is a deficient number, since it is larger than the sum of its proper divisors (11374110766161).

20211222012111 is a wasteful number, since it uses less digits than its factorization.

20211222012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444984 (or 444981 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20211222012111 its reverse (11121022211202), we get a palindrome (31332244223313).

The spelling of 20211222012111 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, twelve thousand, one hundred eleven".