21111010100102 has 8 divisors (see below), whose sum is σ = 34102400930976. Its totient is φ = 9743543123112.

The previous prime is 21111010100093. The next prime is 21111010100113. The reversal of 21111010100102 is 20100101011112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 405980963438 + ... + 405980963489.

It is an arithmetic number, because the mean of its divisors is an integer number (4262800116372).

Almost surely, 2^{21111010100102} is an apocalyptic number.

21111010100102 is a deficient number, since it is larger than the sum of its proper divisors (12991390830874).

21111010100102 is a wasteful number, since it uses less digits than its factorization.

21111010100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811961926942.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21111010100102 its reverse (20100101011112), we get a palindrome (41211111111214).

The spelling of 21111010100102 in words is "twenty-one trillion, one hundred eleven billion, ten million, one hundred thousand, one hundred two".