211222212101021 has 8 divisors (see below), whose sum is σ = 231107982815424. Its totient is φ = 191450399958720.

The previous prime is 211222212101009. The next prime is 211222212101051. The reversal of 211222212101021 is 120101212222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222212101021 is a prime.

It is a super-2 number, since 2×211222212101021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222212100984 and 211222212101002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222212101051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28489639145 + ... + 28489646558.

It is an arithmetic number, because the mean of its divisors is an integer number (28888497851928).

Almost surely, 2^{211222212101021} is an apocalyptic number.

It is an amenable number.

211222212101021 is a deficient number, since it is larger than the sum of its proper divisors (19885770714403).

211222212101021 is a wasteful number, since it uses less digits than its factorization.

211222212101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56979286051.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211222212101021 its reverse (120101212222112), we get a palindrome (331323424323133).

The spelling of 211222212101021 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twelve million, one hundred one thousand, twenty-one".