201211202120111 has 32 divisors (see below), whose sum is σ = 216767272006656. Its totient is φ = 186330846240000.

The previous prime is 201211202120107. The next prime is 201211202120119. The reversal of 201211202120111 is 111021202112102.

It is a cyclic number.

It is not a de Polignac number, because 201211202120111 - 2² = 201211202120107 is a prime.

It is a super-3 number, since 3×201211202120111³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201211202120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211202120119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58186940 + ... + 61547886.

It is an arithmetic number, because the mean of its divisors is an integer number (6773977250208).

Almost surely, 2^{201211202120111} is an apocalyptic number.

201211202120111 is a deficient number, since it is larger than the sum of its proper divisors (15556069886545).

201211202120111 is a wasteful number, since it uses less digits than its factorization.

201211202120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361703.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201211202120111 its reverse (111021202112102), we get a palindrome (312232404232213).

The spelling of 201211202120111 in words is "two hundred one trillion, two hundred eleven billion, two hundred two million, one hundred twenty thousand, one hundred eleven".