1220422240221 has 16 divisors (see below), whose sum is σ = 1662703730688. Its totient is φ = 795895542000.

The previous prime is 1220422240207. The next prime is 1220422240229.

1220422240221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1220422240221 - 2²⁶ = 1220355131357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220422240191 and 1220422240200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220422240229) 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, 1943125 + ... + 2493306.

It is an arithmetic number, because the mean of its divisors is an integer number (103918983168).

Almost surely, 2^{1220422240221} is an apocalyptic number.

It is an amenable number.

1220422240221 is a deficient number, since it is larger than the sum of its proper divisors (442281490467).

1220422240221 is a wasteful number, since it uses less digits than its factorization.

1220422240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438432.

The product of its (nonzero) digits is 2048, while the sum is 24.

The spelling of 1220422240221 in words is "one trillion, two hundred twenty billion, four hundred twenty-two million, two hundred forty thousand, two hundred twenty-one".