1212012201111 has 8 divisors (see below), whose sum is σ = 1686277845120. Its totient is φ = 772877345592.

The previous prime is 1212012201089. The next prime is 1212012201121. The reversal of 1212012201111 is 1111022102121.

It is a happy number.

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

It is not a de Polignac number, because 1212012201111 - 2⁶ = 1212012201047 is a prime.

It is a super-2 number, since 2×1212012201111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212012201121) 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, 8782697041 + ... + 8782697178.

It is an arithmetic number, because the mean of its divisors is an integer number (210784730640).

Almost surely, 2^{1212012201111} is an apocalyptic number.

1212012201111 is a deficient number, since it is larger than the sum of its proper divisors (474265644009).

1212012201111 is a wasteful number, since it uses less digits than its factorization.

1212012201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17565394245.

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

Adding to 1212012201111 its reverse (1111022102121), we get a palindrome (2323034303232).

The spelling of 1212012201111 in words is "one trillion, two hundred twelve billion, twelve million, two hundred one thousand, one hundred eleven".