221121024401 has 16 divisors (see below), whose sum is σ = 229506521088. Its totient is φ = 212817024000.

The previous prime is 221121024391. The next prime is 221121024413. The reversal of 221121024401 is 104420121122.

It is a cyclic number.

It is not a de Polignac number, because 221121024401 - 2¹⁰ = 221121023377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121024101) 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, 4162856 + ... + 4215638.

It is an arithmetic number, because the mean of its divisors is an integer number (14344157568).

Almost surely, 2^221121024401 is an apocalyptic number.

It is an amenable number.

221121024401 is a deficient number, since it is larger than the sum of its proper divisors (8385496687).

221121024401 is a wasteful number, since it uses less digits than its factorization.

221121024401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53552.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221121024401 its reverse (104420121122), we get a palindrome (325541145523).

The spelling of 221121024401 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-four thousand, four hundred one".