21225053315434 has 16 divisors (see below), whose sum is σ = 32016728459520. Its totient is φ = 10552815254880.

The previous prime is 21225053315429. The next prime is 21225053315509. The reversal of 21225053315434 is 43451335052212.

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, 7838374 + ... + 10192654.

It is an arithmetic number, because the mean of its divisors is an integer number (2001045528720).

Almost surely, 2^{21225053315434} is an apocalyptic number.

21225053315434 is a deficient number, since it is larger than the sum of its proper divisors (10791675144086).

21225053315434 is a wasteful number, since it uses less digits than its factorization.

21225053315434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379645.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 21225053315434 its reverse (43451335052212), we get a palindrome (64676388367646).

The spelling of 21225053315434 in words is "twenty-one trillion, two hundred twenty-five billion, fifty-three million, three hundred fifteen thousand, four hundred thirty-four".