221240115404 has 72 divisors (see below), whose sum is σ = 496391131152. Its totient is φ = 85308733440.

The previous prime is 221240115403. The next prime is 221240115461. The reversal of 221240115404 is 404511042122.

It is not an unprimeable number, because it can be changed into a prime (221240115401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319817 + ... + 738080.

It is an arithmetic number, because the mean of its divisors is an integer number (6894321266).

Almost surely, 2^221240115404 is an apocalyptic number.

It is an amenable number.

221240115404 is an abundant number, since it is smaller than the sum of its proper divisors (275151015748).

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

221240115404 is a wasteful number, since it uses less digits than its factorization.

221240115404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058023 (or 1058014 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 221240115404 its reverse (404511042122), we get a palindrome (625751157526).

The spelling of 221240115404 in words is "two hundred twenty-one billion, two hundred forty million, one hundred fifteen thousand, four hundred four".