212100441424309 has 4 divisors (see below), whose sum is σ = 213648619829004. Its totient is φ = 210552263019616.

The previous prime is 212100441424243. The next prime is 212100441424351. The reversal of 212100441424309 is 903424144001212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139925595870225 + 72174845554084 = 11829015^2 + 8495578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212100441424309 is a prime.

It is a super-2 number, since 2×212100441424309² (a number of 29 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 (212100441425309) 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, 774089202142 + ... + 774089202415.

It is an arithmetic number, because the mean of its divisors is an integer number (53412154957251).

Almost surely, 2^{212100441424309} is an apocalyptic number.

It is an amenable number.

212100441424309 is a deficient number, since it is larger than the sum of its proper divisors (1548178404695).

212100441424309 is a wasteful number, since it uses less digits than its factorization.

212100441424309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548178404694.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 212100441424309 in words is "two hundred twelve trillion, one hundred billion, four hundred forty-one million, four hundred twenty-four thousand, three hundred nine".