21111102202101 has 8 divisors (see below), whose sum is σ = 29371968281280. Its totient is φ = 13462152128832.

The previous prime is 21111102202033. The next prime is 21111102202159. The reversal of 21111102202101 is 10120220111112.

It is a happy number.

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

It is not a de Polignac number, because 21111102202101 - 2¹⁴ = 21111102185717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111102202501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152979001396 + ... + 152979001533.

It is an arithmetic number, because the mean of its divisors is an integer number (3671496035160).

Almost surely, 2^{21111102202101} is an apocalyptic number.

It is an amenable number.

21111102202101 is a deficient number, since it is larger than the sum of its proper divisors (8260866079179).

21111102202101 is a wasteful number, since it uses less digits than its factorization.

21111102202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305958002955.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21111102202101 its reverse (10120220111112), we get a palindrome (31231322313213).

The spelling of 21111102202101 in words is "twenty-one trillion, one hundred eleven billion, one hundred two million, two hundred two thousand, one hundred one".