211222021212111 has 512 divisors, whose sum is σ = 400579834281984. Its totient is φ = 95800320000000.

The previous prime is 211222021212071. The next prime is 211222021212121. The reversal of 211222021212111 is 111212120222112.

211222021212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211222021212111 - 2³⁰ = 211220947470287 is a prime.

It is a super-2 number, since 2×211222021212111² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222021212121) by changing a digit.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 70383877611 + ... + 70383880611.

It is an arithmetic number, because the mean of its divisors is an integer number (782382488832).

Almost surely, 2^{211222021212111} is an apocalyptic number.

211222021212111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211222021212111 is a deficient number, since it is larger than the sum of its proper divisors (189357813069873).

211222021212111 is a wasteful number, since it uses less digits than its factorization.

211222021212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211222021212111 its reverse (111212120222112), we get a palindrome (322434141434223).

The spelling of 211222021212111 in words is "two hundred eleven trillion, two hundred twenty-two billion, twenty-one million, two hundred twelve thousand, one hundred eleven".