1212001111201 has 4 divisors (see below), whose sum is σ = 1264696811712. Its totient is φ = 1159305410692.

The previous prime is 1212001111171. The next prime is 1212001111219. The reversal of 1212001111201 is 1021111002121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212001111201 - 2⁵ = 1212001111169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212001111261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26347850221 + ... + 26347850266.

It is an arithmetic number, because the mean of its divisors is an integer number (316174202928).

Almost surely, 2^{1212001111201} is an apocalyptic number.

It is an amenable number.

1212001111201 is a deficient number, since it is larger than the sum of its proper divisors (52695700511).

1212001111201 is an equidigital number, since it uses as much as digits as its factorization.

1212001111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52695700510.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212001111201 its reverse (1021111002121), we get a palindrome (2233112113322).

The spelling of 1212001111201 in words is "one trillion, two hundred twelve billion, one million, one hundred eleven thousand, two hundred one".