21202441242 has 32 divisors (see below), whose sum is σ = 45168181632. Its totient is φ = 6611910144.

The previous prime is 21202441219. The next prime is 21202441283. The reversal of 21202441242 is 24214420212.

It is a happy number.

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, 605323 + ... + 639390.

It is an arithmetic number, because the mean of its divisors is an integer number (1411505676).

Almost surely, 2^21202441242 is an apocalyptic number.

21202441242 is an abundant number, since it is smaller than the sum of its proper divisors (23965740390).

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

21202441242 is a wasteful number, since it uses less digits than its factorization.

21202441242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244902.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21202441242 its reverse (24214420212), we get a palindrome (45416861454).

The spelling of 21202441242 in words is "twenty-one billion, two hundred two million, four hundred forty-one thousand, two hundred forty-two".