21121210011002 has 16 divisors (see below), whose sum is σ = 33978510646560. Its totient is φ = 9816014184912.

The previous prime is 21121210010963. The next prime is 21121210011017. The reversal of 21121210011002 is 20011001212112.

It is a super-2 number, since 2×21121210011002² (a number of 27 digits) contains 22 as substring.

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, 5243595308 + ... + 5243599335.

It is an arithmetic number, because the mean of its divisors is an integer number (2123656915410).

Almost surely, 2^{21121210011002} is an apocalyptic number.

21121210011002 is a deficient number, since it is larger than the sum of its proper divisors (12857300635558).

21121210011002 is a wasteful number, since it uses less digits than its factorization.

21121210011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487194717.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21121210011002 its reverse (20011001212112), we get a palindrome (41132211223114).

The spelling of 21121210011002 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred ten million, eleven thousand, two".