20165101213 has 4 divisors (see below), whose sum is σ = 21041844768. Its totient is φ = 19288357660.

The previous prime is 20165101189. The next prime is 20165101237. The reversal of 20165101213 is 31210156102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31210156102 = 2 ⋅15605078051.

It is an interprime number because it is at equal distance from previous prime (20165101189) and next prime (20165101237).

It is a cyclic number.

It is not a de Polignac number, because 20165101213 - 2⁹ = 20165100701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165101273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438371743 + ... + 438371788.

It is an arithmetic number, because the mean of its divisors is an integer number (5260461192).

Almost surely, 2^20165101213 is an apocalyptic number.

20165101213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20165101213 is a deficient number, since it is larger than the sum of its proper divisors (876743555).

20165101213 is an equidigital number, since it uses as much as digits as its factorization.

20165101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876743554.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 20165101213 its reverse (31210156102), we get a palindrome (51375257315).

The spelling of 20165101213 in words is "twenty billion, one hundred sixty-five million, one hundred one thousand, two hundred thirteen".