1220021222211 has 16 divisors (see below), whose sum is σ = 1971751470720. Its totient is φ = 739406801160.

The previous prime is 1220021222177. The next prime is 1220021222213. The reversal of 1220021222211 is 1122221200221.

It is a happy number.

1220021222211 is a `hidden beast` number, since 1 + 220 + 0 + 212 + 22 + 211 = 666.

It is not a de Polignac number, because 1220021222211 - 2²³ = 1220012833603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220021222213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2053907485 + ... + 2053908078.

It is an arithmetic number, because the mean of its divisors is an integer number (123234466920).

Almost surely, 2^{1220021222211} is an apocalyptic number.

1220021222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220021222211 is a deficient number, since it is larger than the sum of its proper divisors (751730248509).

1220021222211 is a wasteful number, since it uses less digits than its factorization.

1220021222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107815583 (or 4107815577 counting only the distinct ones).

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

Adding to 1220021222211 its reverse (1122221200221), we get a palindrome (2342242422432).

The spelling of 1220021222211 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred twenty-two thousand, two hundred eleven".