21435453122 has 4 divisors (see below), whose sum is σ = 32153179686. Its totient is φ = 10717726560.

The previous prime is 21435453113. The next prime is 21435453139. The reversal of 21435453122 is 22135453412.

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

It can be written as a sum of positive squares in only one way, i.e., 18455494201 + 2979958921 = 135851^2 + 54589^2 .

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 as a sum of consecutive naturals, namely, 5358863279 + ... + 5358863282.

Almost surely, 2^21435453122 is an apocalyptic number.

21435453122 is a deficient number, since it is larger than the sum of its proper divisors (10717726564).

21435453122 is a wasteful number, since it uses less digits than its factorization.

21435453122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10717726563.

The product of its digits is 28800, while the sum is 32.

The spelling of 21435453122 in words is "twenty-one billion, four hundred thirty-five million, four hundred fifty-three thousand, one hundred twenty-two".