21101111000211 has 32 divisors (see below), whose sum is σ = 31535465020416. Its totient is φ = 12437621280000.

The previous prime is 21101111000173. The next prime is 21101111000213. The reversal of 21101111000211 is 11200011110112.

It is not a de Polignac number, because 21101111000211 - 2⁶ = 21101111000147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101111000213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 804850 + ... + 6545991.

It is an arithmetic number, because the mean of its divisors is an integer number (985483281888).

Almost surely, 2^{21101111000211} is an apocalyptic number.

21101111000211 is a deficient number, since it is larger than the sum of its proper divisors (10434354020205).

21101111000211 is a wasteful number, since it uses less digits than its factorization.

21101111000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7353243.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21101111000211 its reverse (11200011110112), we get a palindrome (32301122110323).

The spelling of 21101111000211 in words is "twenty-one trillion, one hundred one billion, one hundred eleven million, two hundred eleven", and thus it is an aban number.