221222333401 has 4 divisors (see below), whose sum is σ = 223289831952. Its totient is φ = 219154834852.

The previous prime is 221222333351. The next prime is 221222333411. The reversal of 221222333401 is 104333222122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221222333401 - 2¹¹ = 221222331353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221222333411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1033749115 + ... + 1033749328.

It is an arithmetic number, because the mean of its divisors is an integer number (55822457988).

Almost surely, 2^221222333401 is an apocalyptic number.

It is an amenable number.

221222333401 is a deficient number, since it is larger than the sum of its proper divisors (2067498551).

221222333401 is a wasteful number, since it uses less digits than its factorization.

221222333401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067498550.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 221222333401 its reverse (104333222122), we get a palindrome (325555555523).

The spelling of 221222333401 in words is "two hundred twenty-one billion, two hundred twenty-two million, three hundred thirty-three thousand, four hundred one".