21112011210101 has 16 divisors (see below), whose sum is σ = 24272975306496. Its totient is φ = 17987292055296.

The previous prime is 21112011210083. The next prime is 21112011210133. The reversal of 21112011210101 is 10101211021112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112011210101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112011210161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70384295 + ... + 70683611.

It is an arithmetic number, because the mean of its divisors is an integer number (1517060956656).

Almost surely, 2^{21112011210101} is an apocalyptic number.

It is an amenable number.

21112011210101 is a deficient number, since it is larger than the sum of its proper divisors (3160964096395).

21112011210101 is a wasteful number, since it uses less digits than its factorization.

21112011210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359828.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21112011210101 its reverse (10101211021112), we get a palindrome (31213222231213).

The spelling of 21112011210101 in words is "twenty-one trillion, one hundred twelve billion, eleven million, two hundred ten thousand, one hundred one".