1211100022201 has 4 divisors (see below), whose sum is σ = 1211123503504. Its totient is φ = 1211076540900.

The previous prime is 1211100022193. The next prime is 1211100022211. The reversal of 1211100022201 is 1022200011121.

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 1211100022201 - 2³ = 1211100022193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211100022211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11663115 + ... + 11766496.

It is an arithmetic number, because the mean of its divisors is an integer number (302780875876).

Almost surely, 2^{1211100022201} is an apocalyptic number.

It is an amenable number.

1211100022201 is a deficient number, since it is larger than the sum of its proper divisors (23481303).

1211100022201 is an equidigital number, since it uses as much as digits as its factorization.

1211100022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23481302.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211100022201 its reverse (1022200011121), we get a palindrome (2233300033322).

The spelling of 1211100022201 in words is "one trillion, two hundred eleven billion, one hundred million, twenty-two thousand, two hundred one".