21122112100101 has 4 divisors (see below), whose sum is σ = 28162816133472. Its totient is φ = 14081408066732.

The previous prime is 21122112100097. The next prime is 21122112100121. The reversal of 21122112100101 is 10100121122112.

It is a happy number.

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 21122112100101 - 2² = 21122112100097 is a prime.

It is a super-2 number, since 2×21122112100101² (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 (21122112100121) 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, 3520352016681 + ... + 3520352016686.

It is an arithmetic number, because the mean of its divisors is an integer number (7040704033368).

Almost surely, 2^{21122112100101} is an apocalyptic number.

It is an amenable number.

21122112100101 is a deficient number, since it is larger than the sum of its proper divisors (7040704033371).

21122112100101 is an equidigital number, since it uses as much as digits as its factorization.

21122112100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040704033370.

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

Adding to 21122112100101 its reverse (10100121122112), we get a palindrome (31222233222213).

The spelling of 21122112100101 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, one hundred thousand, one hundred one".