21220241011404 has 24 divisors (see below), whose sum is σ = 49514036765760. Its totient is φ = 7073393517264.

The previous prime is 21220241011339. The next prime is 21220241011421. The reversal of 21220241011404 is 40411014202212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225587 + ... + 6884309.

It is an arithmetic number, because the mean of its divisors is an integer number (2063084865240).

Almost surely, 2^{21220241011404} is an apocalyptic number.

It is an amenable number.

21220241011404 is an abundant number, since it is smaller than the sum of its proper divisors (28293795754356).

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

21220241011404 is a wasteful number, since it uses less digits than its factorization.

21220241011404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038309 (or 5038307 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 21220241011404 its reverse (40411014202212), we get a palindrome (61631255213616).

The spelling of 21220241011404 in words is "twenty-one trillion, two hundred twenty billion, two hundred forty-one million, eleven thousand, four hundred four".