1220122232211 has 4 divisors (see below), whose sum is σ = 1626829642952. Its totient is φ = 813414821472.

The previous prime is 1220122232207. The next prime is 1220122232237. The reversal of 1220122232211 is 1122322210221.

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

It is not a de Polignac number, because 1220122232211 - 2² = 1220122232207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220122232201) 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, 203353705366 + ... + 203353705371.

It is an arithmetic number, because the mean of its divisors is an integer number (406707410738).

Almost surely, 2^{1220122232211} is an apocalyptic number.

1220122232211 is a deficient number, since it is larger than the sum of its proper divisors (406707410741).

1220122232211 is an equidigital number, since it uses as much as digits as its factorization.

1220122232211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406707410740.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1220122232211 its reverse (1122322210221), we get a palindrome (2342444442432).

The spelling of 1220122232211 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred thirty-two thousand, two hundred eleven".