921072221012002 has 4 divisors (see below), whose sum is σ = 1381608331518006. Its totient is φ = 460536110506000.

The previous prime is 921072221011853. The next prime is 921072221012011. The reversal of 921072221012002 is 200210122270129.

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., 802024722241681 + 119047498770321 = 28320041^2 + 10910889^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230268055252999 + ... + 230268055253002.

Almost surely, 2^{921072221012002} is an apocalyptic number.

921072221012002 is a deficient number, since it is larger than the sum of its proper divisors (460536110506004).

921072221012002 is a wasteful number, since it uses less digits than its factorization.

921072221012002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460536110506003.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 921072221012002 in words is "nine hundred twenty-one trillion, seventy-two billion, two hundred twenty-one million, twelve thousand, two".