1212111122201 has 8 divisors (see below), whose sum is σ = 1391319069120. Its totient is φ = 1034415479088.

The previous prime is 1212111122153. The next prime is 1212111122213. The reversal of 1212111122201 is 1022211112121.

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 1212111122201 - 2⁶ = 1212111122137 is a prime.

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 1212111122201.

It is not an unprimeable number, because it can be changed into a prime (1212111122291) 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, 378074231 + ... + 378077436.

It is an arithmetic number, because the mean of its divisors is an integer number (173914883640).

Almost surely, 2^{1212111122201} is an apocalyptic number.

It is an amenable number.

1212111122201 is a deficient number, since it is larger than the sum of its proper divisors (179207946919).

1212111122201 is an equidigital number, since it uses as much as digits as its factorization.

1212111122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756151903.

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

Adding to 1212111122201 its reverse (1022211112121), we get a palindrome (2234322234322).

The spelling of 1212111122201 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, two hundred one".