1212202221201 has 24 divisors (see below), whose sum is σ = 1815871730400. Its totient is φ = 808106935392.

The previous prime is 1212202221193. The next prime is 1212202221203. The reversal of 1212202221201 is 1021222022121.

It is a happy number.

1212202221201 is a `hidden beast` number, since 1 + 21 + 220 + 2 + 221 + 201 = 666.

It is not a de Polignac number, because 1212202221201 - 2³ = 1212202221193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212202221203) 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, 8898861 + ... + 9034053.

It is an arithmetic number, because the mean of its divisors is an integer number (75661322100).

Almost surely, 2^{1212202221201} is an apocalyptic number.

It is an amenable number.

1212202221201 is a deficient number, since it is larger than the sum of its proper divisors (603669509199).

1212202221201 is an equidigital number, since it uses as much as digits as its factorization.

1212202221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172107 (or 172095 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212202221201 its reverse (1021222022121), we get a palindrome (2233424243322).

The spelling of 1212202221201 in words is "one trillion, two hundred twelve billion, two hundred two million, two hundred twenty-one thousand, two hundred one".