1212212111201 has 24 divisors (see below), whose sum is σ = 1506702127680. Its totient is φ = 954924399936.

The previous prime is 1212212111153. The next prime is 1212212111203. The reversal of 1212212111201 is 1021112122121.

It is not a de Polignac number, because 1212212111201 - 2¹⁴ = 1212212094817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212212111201.

It is not an unprimeable number, because it can be changed into a prime (1212212111203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1966415 + ... + 2508228.

It is an arithmetic number, because the mean of its divisors is an integer number (62779255320).

Almost surely, 2^{1212212111201} is an apocalyptic number.

It is an amenable number.

1212212111201 is a deficient number, since it is larger than the sum of its proper divisors (294490016479).

1212212111201 is a wasteful number, since it uses less digits than its factorization.

1212212111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474905 (or 4474892 counting only the distinct ones).

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

Adding to 1212212111201 its reverse (1021112122121), we get a palindrome (2233324233322).

The spelling of 1212212111201 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred eleven thousand, two hundred one".