21313112301109 has 2 divisors, whose sum is σ = 21313112301110. Its totient is φ = 21313112301108.

The previous prime is 21313112301031. The next prime is 21313112301137. The reversal of 21313112301109 is 90110321131312.

It is an a-pointer prime, because the next prime (21313112301137) can be obtained adding 21313112301109 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17824144078225 + 3488968222884 = 4221865^2 + 1867878^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313112301109 - 2¹³ = 21313112292917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313112301809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656556150554 + 10656556150555.

It is an arithmetic number, because the mean of its divisors is an integer number (10656556150555).

Almost surely, 2^{21313112301109} is an apocalyptic number.

It is an amenable number.

21313112301109 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313112301109 is an equidigital number, since it uses as much as digits as its factorization.

21313112301109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 21313112301109 in words is "twenty-one trillion, three hundred thirteen billion, one hundred twelve million, three hundred one thousand, one hundred nine".