21221011121002 has 32 divisors (see below), whose sum is σ = 41774786081280. Its totient is φ = 7832772388080.

The previous prime is 21221011120979. The next prime is 21221011121081. The reversal of 21221011121002 is 20012111012212.

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 in 15 ways as a sum of consecutive naturals, for example, 3626280588 + ... + 3626286439.

It is an arithmetic number, because the mean of its divisors is an integer number (1305462065040).

Almost surely, 2^{21221011121002} is an apocalyptic number.

21221011121002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221011121002 is a deficient number, since it is larger than the sum of its proper divisors (20553774960278).

21221011121002 is a wasteful number, since it uses less digits than its factorization.

21221011121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252567066.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221011121002 its reverse (20012111012212), we get a palindrome (41233122133214).

The spelling of 21221011121002 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred twenty-one thousand, two".