21122101011101 has 4 divisors (see below), whose sum is σ = 21122370617472. Its totient is φ = 21121831404732.

The previous prime is 21122101011097. The next prime is 21122101011149. The reversal of 21122101011101 is 10111010122112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21122101011101 - 2² = 21122101011097 is a prime.

It is a super-2 number, since 2×21122101011101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122101011181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134685635 + ... + 134842368.

It is an arithmetic number, because the mean of its divisors is an integer number (5280592654368).

Almost surely, 2^{21122101011101} is an apocalyptic number.

It is an amenable number.

21122101011101 is a deficient number, since it is larger than the sum of its proper divisors (269606371).

21122101011101 is an equidigital number, since it uses as much as digits as its factorization.

21122101011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269606370.

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

Adding to 21122101011101 its reverse (10111010122112), we get a palindrome (31233111133213).

The spelling of 21122101011101 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred one million, eleven thousand, one hundred one".