1211201220201 has 48 divisors (see below), whose sum is σ = 1907861194368. Its totient is φ = 681368889600.

The previous prime is 1211201220167. The next prime is 1211201220253. The reversal of 1211201220201 is 1020221021121.

It is not a de Polignac number, because 1211201220201 - 2⁶ = 1211201220137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211201220001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5701156 + ... + 5909786.

It is an arithmetic number, because the mean of its divisors is an integer number (39747108216).

Almost surely, 2^{1211201220201} is an apocalyptic number.

It is an amenable number.

1211201220201 is a deficient number, since it is larger than the sum of its proper divisors (696659974167).

1211201220201 is a wasteful number, since it uses less digits than its factorization.

1211201220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209262 (or 209255 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211201220201 its reverse (1020221021121), we get a palindrome (2231422241322).

The spelling of 1211201220201 in words is "one trillion, two hundred eleven billion, two hundred one million, two hundred twenty thousand, two hundred one".