21111000102101 has 8 divisors (see below), whose sum is σ = 25982769356544. Its totient is φ = 16703208871920.

The previous prime is 21111000102029. The next prime is 21111000102109. The reversal of 21111000102101 is 10120100011112.

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

It is a cyclic number.

It is not a de Polignac number, because 21111000102101 - 2¹⁴ = 21111000085717 is a prime.

It is a super-2 number, since 2×21111000102101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111000102109) by changing a digit.

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, 115994505965 + ... + 115994506146.

It is an arithmetic number, because the mean of its divisors is an integer number (3247846169568).

Almost surely, 2^{21111000102101} is an apocalyptic number.

It is an amenable number.

21111000102101 is a deficient number, since it is larger than the sum of its proper divisors (4871769254443).

21111000102101 is a wasteful number, since it uses less digits than its factorization.

21111000102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231989012131.

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

Adding to 21111000102101 its reverse (10120100011112), we get a palindrome (31231100113213).

The spelling of 21111000102101 in words is "twenty-one trillion, one hundred eleven billion, one hundred two thousand, one hundred one".