21221011122002 has 16 divisors (see below), whose sum is σ = 32634777315672. Its totient is φ = 10343178718080.

The previous prime is 21221011121993. The next prime is 21221011122019. The reversal of 21221011122002 is 20022111012212.

It can be written as a sum of positive squares in 4 ways, for example, as 14824355758081 + 6396655363921 = 3850241^2 + 2529161^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 106575233 + ... + 106774164.

Almost surely, 2^{21221011122002} is an apocalyptic number.

21221011122002 is a deficient number, since it is larger than the sum of its proper divisors (11413766193670).

21221011122002 is a wasteful number, since it uses less digits than its factorization.

21221011122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213350653.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221011122002 its reverse (20022111012212), we get a palindrome (41243122134214).

The spelling of 21221011122002 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred twenty-two thousand, two".