101240243213 has 4 divisors (see below), whose sum is σ = 101487774780. Its totient is φ = 100992711648.

The previous prime is 101240243197. The next prime is 101240243219. The reversal of 101240243213 is 312342042101.

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 87392366884 + 13847876329 = 295622^2 + 117677^2 .

It is a cyclic number.

It is not a de Polignac number, because 101240243213 - 2⁴ = 101240243197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101240243219) 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, 123765170 + ... + 123765987.

It is an arithmetic number, because the mean of its divisors is an integer number (25371943695).

Almost surely, 2^101240243213 is an apocalyptic number.

It is an amenable number.

101240243213 is a deficient number, since it is larger than the sum of its proper divisors (247531567).

101240243213 is an equidigital number, since it uses as much as digits as its factorization.

101240243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247531566.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 101240243213 its reverse (312342042101), we get a palindrome (413582285314).

The spelling of 101240243213 in words is "one hundred one billion, two hundred forty million, two hundred forty-three thousand, two hundred thirteen".