221220100003331 has 16 divisors (see below), whose sum is σ = 260059537570560. Its totient is φ = 185521676965920.

The previous prime is 221220100003319. The next prime is 221220100003379. The reversal of 221220100003331 is 133300001022122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221220100003331 is a prime.

It is a super-2 number, since 2×221220100003331² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221220100003631) 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, 489639215 + ... + 490090808.

It is an arithmetic number, because the mean of its divisors is an integer number (16253721098160).

Almost surely, 2^{221220100003331} is an apocalyptic number.

221220100003331 is a deficient number, since it is larger than the sum of its proper divisors (38839437567229).

221220100003331 is a wasteful number, since it uses less digits than its factorization.

221220100003331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979731626.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221220100003331 its reverse (133300001022122), we get a palindrome (354520101025453).

The spelling of 221220100003331 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred million, three thousand, three hundred thirty-one".