21141243242 has 64 divisors (see below), whose sum is σ = 37581594624. Its totient is φ = 8732330880.

The previous prime is 21141243229. The next prime is 21141243271. The reversal of 21141243242 is 24234214112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28453523 + ... + 28454265.

It is an arithmetic number, because the mean of its divisors is an integer number (587212416).

Almost surely, 2^21141243242 is an apocalyptic number.

21141243242 is a deficient number, since it is larger than the sum of its proper divisors (16440351382).

21141243242 is a wasteful number, since it uses less digits than its factorization.

21141243242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its digits is 3072, while the sum is 26.

Adding to 21141243242 its reverse (24234214112), we get a palindrome (45375457354).

The spelling of 21141243242 in words is "twenty-one billion, one hundred forty-one million, two hundred forty-three thousand, two hundred forty-two".