20031021211 has 2 divisors, whose sum is σ = 20031021212. Its totient is φ = 20031021210.

The previous prime is 20031021203. The next prime is 20031021271. The reversal of 20031021211 is 11212013002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20031021211 - 2³ = 20031021203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20031021191 and 20031021200.

It is not a weakly prime, because it can be changed into another prime (20031021271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015510605 + 10015510606.

It is an arithmetic number, because the mean of its divisors is an integer number (10015510606).

Almost surely, 2^20031021211 is an apocalyptic number.

20031021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031021211 is an equidigital number, since it uses as much as digits as its factorization.

20031021211 is an evil number, because the sum of its binary digits is even.

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

Adding to 20031021211 its reverse (11212013002), we get a palindrome (31243034213).

The spelling of 20031021211 in words is "twenty billion, thirty-one million, twenty-one thousand, two hundred eleven".