12100435381 has 2 divisors, whose sum is σ = 12100435382. Its totient is φ = 12100435380.

The previous prime is 12100435351. The next prime is 12100435427. The reversal of 12100435381 is 18353400121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7686028900 + 4414406481 = 87670^2 + 66441^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100435381 - 2⁹ = 12100434869 is a prime.

It is a super-2 number, since 2×12100435381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100435301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050217690 + 6050217691.

It is an arithmetic number, because the mean of its divisors is an integer number (6050217691).

Almost surely, 2^12100435381 is an apocalyptic number.

It is an amenable number.

12100435381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100435381 is an equidigital number, since it uses as much as digits as its factorization.

12100435381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 12100435381 in words is "twelve billion, one hundred million, four hundred thirty-five thousand, three hundred eighty-one".