211201222221111 has 8 divisors (see below), whose sum is σ = 281689383342960. Its totient is φ = 140756937956672.

The previous prime is 211201222221061. The next prime is 211201222221139. The reversal of 211201222221111 is 111122222102112.

211201222221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 211201222221111 - 2³¹ = 211199074737463 is a prime.

It is a super-3 number, since 3×211201222221111³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201222229111) 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, 10969203120 + ... + 10969222373.

It is an arithmetic number, because the mean of its divisors is an integer number (35211172917870).

Almost surely, 2^{211201222221111} is an apocalyptic number.

211201222221111 is a deficient number, since it is larger than the sum of its proper divisors (70488161121849).

211201222221111 is a wasteful number, since it uses less digits than its factorization.

211201222221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21938428705.

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

Adding to 211201222221111 its reverse (111122222102112), we get a palindrome (322323444323223).

The spelling of 211201222221111 in words is "two hundred eleven trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".