21121134302242 has 32 divisors (see below), whose sum is σ = 35754978849408. Its totient is φ = 9284361499776.

The previous prime is 21121134302239. The next prime is 21121134302269. The reversal of 21121134302242 is 24220343112112.

It is a super-2 number, since 2×21121134302242² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121134302242.

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, 75653848 + ... + 75932515.

It is an arithmetic number, because the mean of its divisors is an integer number (1117343089044).

Almost surely, 2^{21121134302242} is an apocalyptic number.

21121134302242 is a deficient number, since it is larger than the sum of its proper divisors (14633844547166).

21121134302242 is a wasteful number, since it uses less digits than its factorization.

21121134302242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151586634.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21121134302242 its reverse (24220343112112), we get a palindrome (45341477414354).

The spelling of 21121134302242 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred thirty-four million, three hundred two thousand, two hundred forty-two".