21225053315435 has 4 divisors (see below), whose sum is σ = 25470063978528. Its totient is φ = 16980042652344.

The previous prime is 21225053315429. The next prime is 21225053315509. The reversal of 21225053315435 is 53451335052212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21225053315435 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21225053315392 and 21225053315401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122505331539 + ... + 2122505331548.

It is an arithmetic number, because the mean of its divisors is an integer number (6367515994632).

Almost surely, 2^{21225053315435} is an apocalyptic number.

21225053315435 is a deficient number, since it is larger than the sum of its proper divisors (4245010663093).

21225053315435 is an equidigital number, since it uses as much as digits as its factorization.

21225053315435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245010663092.

The product of its (nonzero) digits is 540000, while the sum is 41.

Adding to 21225053315435 its reverse (53451335052212), we get a palindrome (74676388367647).

The spelling of 21225053315435 in words is "twenty-one trillion, two hundred twenty-five billion, fifty-three million, three hundred fifteen thousand, four hundred thirty-five".