1220001100211 has 4 divisors (see below), whose sum is σ = 1220004537912. Its totient is φ = 1219997662512.

The previous prime is 1220001100207. The next prime is 1220001100223. The reversal of 1220001100211 is 1120011000221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220001100211 - 2² = 1220001100207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220001100192 and 1220001100201.

It is not an unprimeable number, because it can be changed into a prime (1220001100511) 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, 1116050 + ... + 1919783.

It is an arithmetic number, because the mean of its divisors is an integer number (305001134478).

Almost surely, 2^{1220001100211} is an apocalyptic number.

1220001100211 is a deficient number, since it is larger than the sum of its proper divisors (3437701).

1220001100211 is an equidigital number, since it uses as much as digits as its factorization.

1220001100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3437700.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1220001100211 its reverse (1120011000221), we get a palindrome (2340012100432).

The spelling of 1220001100211 in words is "one trillion, two hundred twenty billion, one million, one hundred thousand, two hundred eleven".