21130101242 has 16 divisors (see below), whose sum is σ = 33394308480. Its totient is φ = 10007584752.

The previous prime is 21130101199. The next prime is 21130101257. The reversal of 21130101242 is 24210103112.

It is a self number, because there is not a number n which added to its sum of digits gives 21130101242.

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, 2225117 + ... + 2234592.

It is an arithmetic number, because the mean of its divisors is an integer number (2087144280).

Almost surely, 2^21130101242 is an apocalyptic number.

21130101242 is a deficient number, since it is larger than the sum of its proper divisors (12264207238).

21130101242 is a wasteful number, since it uses less digits than its factorization.

21130101242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459837.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21130101242 its reverse (24210103112), we get a palindrome (45340204354).

The spelling of 21130101242 in words is "twenty-one billion, one hundred thirty million, one hundred one thousand, two hundred forty-two".