1220011333221 has 32 divisors (see below), whose sum is σ = 1675090730880. Its totient is φ = 789355212800.

The previous prime is 1220011333213. The next prime is 1220011333243. The reversal of 1220011333221 is 1223331100221.

It is a cyclic number.

It is not a de Polignac number, because 1220011333221 - 2³ = 1220011333213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220011333201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18159031 + ... + 18226091.

It is an arithmetic number, because the mean of its divisors is an integer number (52346585340).

Almost surely, 2^{1220011333221} is an apocalyptic number.

It is an amenable number.

1220011333221 is a deficient number, since it is larger than the sum of its proper divisors (455079397659).

1220011333221 is a wasteful number, since it uses less digits than its factorization.

1220011333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67877.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1220011333221 its reverse (1223331100221), we get a palindrome (2443342433442).

The spelling of 1220011333221 in words is "one trillion, two hundred twenty billion, eleven million, three hundred thirty-three thousand, two hundred twenty-one".