201210122001111 has 4 divisors (see below), whose sum is σ = 268280162668152. Its totient is φ = 134140081334072.

The previous prime is 201210122001047. The next prime is 201210122001113. The reversal of 201210122001111 is 111100221012102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201210122001111 - 2⁶ = 201210122001047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210122001113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33535020333516 + ... + 33535020333521.

It is an arithmetic number, because the mean of its divisors is an integer number (67070040667038).

Almost surely, 2^{201210122001111} is an apocalyptic number.

201210122001111 is a deficient number, since it is larger than the sum of its proper divisors (67070040667041).

201210122001111 is an equidigital number, since it uses as much as digits as its factorization.

201210122001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67070040667040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201210122001111 its reverse (111100221012102), we get a palindrome (312310343013213).

The spelling of 201210122001111 in words is "two hundred one trillion, two hundred ten billion, one hundred twenty-two million, one thousand, one hundred eleven".