21201211122002 has 16 divisors (see below), whose sum is σ = 32204555030400. Its totient is φ = 10466360976240.

The previous prime is 21201211121989. The next prime is 21201211122089. The reversal of 21201211122002 is 20022111210212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42707249 + ... + 43200827.

It is an arithmetic number, because the mean of its divisors is an integer number (2012784689400).

Almost surely, 2^{21201211122002} is an apocalyptic number.

21201211122002 is a deficient number, since it is larger than the sum of its proper divisors (11003343908398).

21201211122002 is a wasteful number, since it uses less digits than its factorization.

21201211122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765521.

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

Adding to 21201211122002 its reverse (20022111210212), we get a palindrome (41223322332214).

The spelling of 21201211122002 in words is "twenty-one trillion, two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, two".