221444402142 has 16 divisors (see below), whose sum is σ = 448494992640. Its totient is φ = 72880435992.

The previous prime is 221444402129. The next prime is 221444402147. The reversal of 221444402142 is 241204444122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221444402147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233590668 + ... + 233591615.

It is an arithmetic number, because the mean of its divisors is an integer number (28030937040).

Almost surely, 2^221444402142 is an apocalyptic number.

221444402142 is an abundant number, since it is smaller than the sum of its proper divisors (227050590498).

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

221444402142 is a wasteful number, since it uses less digits than its factorization.

221444402142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467182367.

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 221444402142 its reverse (241204444122), we get a palindrome (462648846264).

The spelling of 221444402142 in words is "two hundred twenty-one billion, four hundred forty-four million, four hundred two thousand, one hundred forty-two".