20211222112101 has 12 divisors (see below), whose sum is σ = 29983014184812. Its totient is φ = 13109981910336.

The previous prime is 20211222112099. The next prime is 20211222112117. The reversal of 20211222112101 is 10121122211202.

20211222112101 is a `hidden beast` number, since 20 + 211 + 2 + 221 + 1 + 210 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13440479847876 + 6770742264225 = 3666126^2 + 2602065^2 .

It is not a de Polignac number, because 20211222112101 - 2¹ = 20211222112099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211222112181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30347180016 + ... + 30347180681.

It is an arithmetic number, because the mean of its divisors is an integer number (2498584515401).

Almost surely, 2^{20211222112101} is an apocalyptic number.

It is an amenable number.

20211222112101 is a deficient number, since it is larger than the sum of its proper divisors (9771792072711).

20211222112101 is a wasteful number, since it uses less digits than its factorization.

20211222112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60694360740 (or 60694360737 counting only the distinct ones).

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

Adding to 20211222112101 its reverse (10121122211202), we get a palindrome (30332344323303).

The spelling of 20211222112101 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred one".