1211211201201 has 16 divisors (see below), whose sum is σ = 1679211591168. Its totient is φ = 775722729600.

The previous prime is 1211211201197. The next prime is 1211211201229. The reversal of 1211211201201 is 1021021121121.

It is a happy number.

It is not a de Polignac number, because 1211211201201 - 2² = 1211211201197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211211201281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47519290 + ... + 47544771.

It is an arithmetic number, because the mean of its divisors is an integer number (104950724448).

Almost surely, 2^{1211211201201} is an apocalyptic number.

It is an amenable number.

1211211201201 is a deficient number, since it is larger than the sum of its proper divisors (468000389967).

1211211201201 is a wasteful number, since it uses less digits than its factorization.

1211211201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95064232.

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

Adding to 1211211201201 its reverse (1021021121121), we get a palindrome (2232232322322).

The spelling of 1211211201201 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred one thousand, two hundred one".