20001210021211 has 2 divisors, whose sum is σ = 20001210021212. Its totient is φ = 20001210021210.

The previous prime is 20001210021193. The next prime is 20001210021241. The reversal of 20001210021211 is 11212001210002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001210021211 - 2²¹ = 20001207924059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001210021191 and 20001210021200.

It is not a weakly prime, because it can be changed into another prime (20001210021241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605010605 + 10000605010606.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605010606).

Almost surely, 2^{20001210021211} is an apocalyptic number.

20001210021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001210021211 is an equidigital number, since it uses as much as digits as its factorization.

20001210021211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001210021211 its reverse (11212001210002), we get a palindrome (31213211231213).

The spelling of 20001210021211 in words is "twenty trillion, one billion, two hundred ten million, twenty-one thousand, two hundred eleven".