1220022002221 has 16 divisors (see below), whose sum is σ = 1339966152000. Its totient is φ = 1101584483200.

The previous prime is 1220022002207. The next prime is 1220022002257. The reversal of 1220022002221 is 1222002200221.

It is a cyclic number.

It is not a de Polignac number, because 1220022002221 - 2¹⁷ = 1220021871149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220022002195 and 1220022002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220022002201) 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, 35845950 + ... + 35879968.

It is an arithmetic number, because the mean of its divisors is an integer number (83747884500).

Almost surely, 2^{1220022002221} is an apocalyptic number.

1220022002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220022002221 is a deficient number, since it is larger than the sum of its proper divisors (119944149779).

1220022002221 is a wasteful number, since it uses less digits than its factorization.

1220022002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56060.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1220022002221 its reverse (1222002200221), we get a palindrome (2442024202442).

The spelling of 1220022002221 in words is "one trillion, two hundred twenty billion, twenty-two million, two thousand, two hundred twenty-one".