211222111112021 has 48 divisors (see below), whose sum is σ = 229326214896000. Its totient is φ = 194464237473792.

The previous prime is 211222111112009. The next prime is 211222111112029. The reversal of 211222111112021 is 120211111222112.

It is a happy number.

It is not a de Polignac number, because 211222111112021 - 2⁴² = 206824064600917 is a prime.

It is a super-2 number, since 2×211222111112021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211222111111984 and 211222111112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222111112029) 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, 1313988470 + ... + 1314149208.

It is an arithmetic number, because the mean of its divisors is an integer number (4777629477000).

Almost surely, 2^{211222111112021} is an apocalyptic number.

It is an amenable number.

211222111112021 is a deficient number, since it is larger than the sum of its proper divisors (18104103783979).

211222111112021 is a wasteful number, since it uses less digits than its factorization.

211222111112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161358 (or 161341 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211222111112021 its reverse (120211111222112), we get a palindrome (331433222334133).

The spelling of 211222111112021 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred eleven million, one hundred twelve thousand, twenty-one".