21500034215522 has 4 divisors (see below), whose sum is σ = 32250051323286. Its totient is φ = 10750017107760.

The previous prime is 21500034215519. The next prime is 21500034215533. The reversal of 21500034215522 is 22551243000512.

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., 12509937489721 + 8990096725801 = 3536939^2 + 2998349^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5375008553879 + ... + 5375008553882.

Almost surely, 2^{21500034215522} is an apocalyptic number.

21500034215522 is a deficient number, since it is larger than the sum of its proper divisors (10750017107764).

21500034215522 is a wasteful number, since it uses less digits than its factorization.

21500034215522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10750017107763.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 21500034215522 in words is "twenty-one trillion, five hundred billion, thirty-four million, two hundred fifteen thousand, five hundred twenty-two".