20012021101213 has 2 divisors, whose sum is σ = 20012021101214. Its totient is φ = 20012021101212.

The previous prime is 20012021101201. The next prime is 20012021101223. The reversal of 20012021101213 is 31210112021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19122315630649 + 889705470564 = 4372907^2 + 943242^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012021101213 - 2⁵ = 20012021101181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012021101223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006010550606 + 10006010550607.

It is an arithmetic number, because the mean of its divisors is an integer number (10006010550607).

Almost surely, 2^{20012021101213} is an apocalyptic number.

It is an amenable number.

20012021101213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012021101213 is an equidigital number, since it uses as much as digits as its factorization.

20012021101213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20012021101213 its reverse (31210112021002), we get a palindrome (51222133122215).

The spelling of 20012021101213 in words is "twenty trillion, twelve billion, twenty-one million, one hundred one thousand, two hundred thirteen".