21225451245 has 16 divisors (see below), whose sum is σ = 34310834880. Its totient is φ = 11203536384.

The previous prime is 21225451231. The next prime is 21225451271. The reversal of 21225451245 is 54215452212.

It is not a de Polignac number, because 21225451245 - 2⁴ = 21225451229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7292515 + ... + 7295424.

It is an arithmetic number, because the mean of its divisors is an integer number (2144427180).

Almost surely, 2^21225451245 is an apocalyptic number.

It is an amenable number.

21225451245 is a deficient number, since it is larger than the sum of its proper divisors (13085383635).

21225451245 is a wasteful number, since it uses less digits than its factorization.

21225451245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14588044.

The product of its digits is 32000, while the sum is 33.

The spelling of 21225451245 in words is "twenty-one billion, two hundred twenty-five million, four hundred fifty-one thousand, two hundred forty-five".