21122512023446 has 4 divisors (see below), whose sum is σ = 31683768035172. Its totient is φ = 10561256011722.

The previous prime is 21122512023439. The next prime is 21122512023533. The reversal of 21122512023446 is 64432021522112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280628005860 + ... + 5280628005863.

It is an arithmetic number, because the mean of its divisors is an integer number (7920942008793).

Almost surely, 2^{21122512023446} is an apocalyptic number.

21122512023446 is a deficient number, since it is larger than the sum of its proper divisors (10561256011726).

21122512023446 is a wasteful number, since it uses less digits than its factorization.

21122512023446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10561256011725.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 21122512023446 its reverse (64432021522112), we get a palindrome (85554533545558).

The spelling of 21122512023446 in words is "twenty-one trillion, one hundred twenty-two billion, five hundred twelve million, twenty-three thousand, four hundred forty-six".