21034231242 has 32 divisors (see below), whose sum is σ = 42751445760. Its totient is φ = 6898060800.

The previous prime is 21034231217. The next prime is 21034231277. The reversal of 21034231242 is 24213243012.

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, 115759 + ... + 235517.

It is an arithmetic number, because the mean of its divisors is an integer number (1335982680).

Almost surely, 2^21034231242 is an apocalyptic number.

21034231242 is an abundant number, since it is smaller than the sum of its proper divisors (21717214518).

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

21034231242 is a wasteful number, since it uses less digits than its factorization.

21034231242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120238.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21034231242 its reverse (24213243012), we get a palindrome (45247474254).

The spelling of 21034231242 in words is "twenty-one billion, thirty-four million, two hundred thirty-one thousand, two hundred forty-two".