1220001222211 has 8 divisors (see below), whose sum is σ = 1276347933504. Its totient is φ = 1164920729280.

The previous prime is 1220001222197. The next prime is 1220001222337. The reversal of 1220001222211 is 1122221000221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220001222211 - 2¹⁵ = 1220001189443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220008222211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316552620 + ... + 316556473.

It is an arithmetic number, because the mean of its divisors is an integer number (159543491688).

Almost surely, 2^{1220001222211} is an apocalyptic number.

1220001222211 is a deficient number, since it is larger than the sum of its proper divisors (56346711293).

1220001222211 is an equidigital number, since it uses as much as digits as its factorization.

1220001222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633109181.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220001222211 its reverse (1122221000221), we get a palindrome (2342222222432).

The spelling of 1220001222211 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty-two thousand, two hundred eleven".