21111010200002 has 4 divisors (see below), whose sum is σ = 31666515300006. Its totient is φ = 10555505100000.

The previous prime is 21111010199963. The next prime is 21111010200013. The reversal of 21111010200002 is 20000201011112.

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., 20612589731881 + 498420468121 = 4540109^2 + 705989^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277752549999 + ... + 5277752550002.

Almost surely, 2^{21111010200002} is an apocalyptic number.

21111010200002 is a deficient number, since it is larger than the sum of its proper divisors (10555505100004).

21111010200002 is a wasteful number, since it uses less digits than its factorization.

21111010200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555505100003.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21111010200002 its reverse (20000201011112), we get a palindrome (41111211211114).

The spelling of 21111010200002 in words is "twenty-one trillion, one hundred eleven billion, ten million, two hundred thousand, two".