1222220021211 has 64 divisors (see below), whose sum is σ = 2138329600000. Its totient is φ = 689570376768.

The previous prime is 1222220021177. The next prime is 1222220021249. The reversal of 1222220021211 is 1121200222221.

It is a happy number.

1222220021211 is a `hidden beast` number, since 1 + 222 + 220 + 0 + 212 + 11 = 666.

It is not a de Polignac number, because 1222220021211 - 2⁹ = 1222220020699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222220021111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103666 + ... + 1566903.

It is an arithmetic number, because the mean of its divisors is an integer number (33411400000).

Almost surely, 2^{1222220021211} is an apocalyptic number.

1222220021211 is a deficient number, since it is larger than the sum of its proper divisors (916109578789).

1222220021211 is an equidigital number, since it uses as much as digits as its factorization.

1222220021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670678 (or 1670658 counting only the distinct ones).

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

Adding to 1222220021211 its reverse (1121200222221), we get a palindrome (2343420243432).

The spelling of 1222220021211 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, twenty-one thousand, two hundred eleven".