21240141442 has 16 divisors (see below), whose sum is σ = 34346374272. Its totient is φ = 9793034640.

The previous prime is 21240141431. The next prime is 21240141451. The reversal of 21240141442 is 24414104212.

It is a happy number.

It is a super-2 number, since 2×21240141442² (a number of 21 digits) contains 22 as substring.

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, 395418 + ... + 445909.

It is an arithmetic number, because the mean of its divisors is an integer number (2146648392).

Almost surely, 2^21240141442 is an apocalyptic number.

21240141442 is a deficient number, since it is larger than the sum of its proper divisors (13106232830).

21240141442 is a wasteful number, since it uses less digits than its factorization.

21240141442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842313.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21240141442 its reverse (24414104212), we get a palindrome (45654245654).

The spelling of 21240141442 in words is "twenty-one billion, two hundred forty million, one hundred forty-one thousand, four hundred forty-two".