20012101213 has 8 divisors (see below), whose sum is σ = 21904797656. Its totient is φ = 18169876800.

The previous prime is 20012101171. The next prime is 20012101247. The reversal of 20012101213 is 31210121002.

It can be written as a sum of positive squares in 4 ways, for example, as 175350564 + 19836750649 = 13242^2 + 140843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20012101213 - 2¹⁷ = 20011970141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012101193 and 20012101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012101273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12617178 + ... + 12618763.

It is an arithmetic number, because the mean of its divisors is an integer number (2738099707).

Almost surely, 2^20012101213 is an apocalyptic number.

It is an amenable number.

20012101213 is a deficient number, since it is larger than the sum of its proper divisors (1892696443).

20012101213 is a wasteful number, since it uses less digits than its factorization.

20012101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25236015.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20012101213 its reverse (31210121002), we get a palindrome (51222222215).

The spelling of 20012101213 in words is "twenty billion, twelve million, one hundred one thousand, two hundred thirteen".