221222012001 has 4 divisors (see below), whose sum is σ = 294962682672. Its totient is φ = 147481341332.

The previous prime is 221222011999. The next prime is 221222012009. The reversal of 221222012001 is 100210222122.

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 221222012001 - 2¹ = 221222011999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221222012009) 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, 36870335331 + ... + 36870335336.

It is an arithmetic number, because the mean of its divisors is an integer number (73740670668).

Almost surely, 2^221222012001 is an apocalyptic number.

It is an amenable number.

221222012001 is a deficient number, since it is larger than the sum of its proper divisors (73740670671).

221222012001 is an equidigital number, since it uses as much as digits as its factorization.

221222012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73740670670.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221222012001 its reverse (100210222122), we get a palindrome (321432234123).

The spelling of 221222012001 in words is "two hundred twenty-one billion, two hundred twenty-two million, twelve thousand, one".