20211222212101 has 12 divisors (see below), whose sum is σ = 22033887678400. Its totient is φ = 18487215947088.

The previous prime is 20211222212089. The next prime is 20211222212117. The reversal of 20211222212101 is 10121222211202.

It is not a de Polignac number, because 20211222212101 - 2²¹ = 20211220114949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211222212801) 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, 632414781 + ... + 632446738.

Almost surely, 2^{20211222212101} is an apocalyptic number.

It is an amenable number.

20211222212101 is a deficient number, since it is larger than the sum of its proper divisors (1822665466299).

20211222212101 is a wasteful number, since it uses less digits than its factorization.

20211222212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264861596 (or 1264861567 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20211222212101 its reverse (10121222211202), we get a palindrome (30332444423303).

The spelling of 20211222212101 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, one hundred one".