221213401444 has 48 divisors (see below), whose sum is σ = 460137521536. Its totient is φ = 91082880000.

The previous prime is 221213401427. The next prime is 221213401477. The reversal of 221213401444 is 444104312122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1432557 + ... + 1579444.

Almost surely, 2^221213401444 is an apocalyptic number.

It is an amenable number.

221213401444 is an abundant number, since it is smaller than the sum of its proper divisors (238924120092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221213401444 is a wasteful number, since it uses less digits than its factorization.

221213401444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012116 (or 3012114 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 221213401444 its reverse (444104312122), we get a palindrome (665317713566).

The spelling of 221213401444 in words is "two hundred twenty-one billion, two hundred thirteen million, four hundred one thousand, four hundred forty-four".