1212211222201 has 8 divisors (see below), whose sum is σ = 1398331771200. Its totient is φ = 1029327552528.

The previous prime is 1212211222163. The next prime is 1212211222231. The reversal of 1212211222201 is 1022221122121.

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 1212211222201 - 2¹⁵ = 1212211189433 is a prime.

It is a super-3 number, since 3×1212211222201³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212211222231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809219026 + ... + 809220523.

It is an arithmetic number, because the mean of its divisors is an integer number (174791471400).

Almost surely, 2^{1212211222201} is an apocalyptic number.

It is an amenable number.

1212211222201 is a deficient number, since it is larger than the sum of its proper divisors (186120548999).

1212211222201 is a wasteful number, since it uses less digits than its factorization.

1212211222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618439663.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212211222201 its reverse (1022221122121), we get a palindrome (2234432344322).

The spelling of 1212211222201 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, two hundred one".