21100020001211 has 2 divisors, whose sum is σ = 21100020001212. Its totient is φ = 21100020001210.

The previous prime is 21100020001199. The next prime is 21100020001223. The reversal of 21100020001211 is 11210002000112.

It is a balanced prime because it is at equal distance from previous prime (21100020001199) and next prime (21100020001223).

It is a cyclic number.

It is not a de Polignac number, because 21100020001211 - 2¹⁸ = 21100019739067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21100020001192 and 21100020001201.

It is not a weakly prime, because it can be changed into another prime (21100020001271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550010000605 + 10550010000606.

It is an arithmetic number, because the mean of its divisors is an integer number (10550010000606).

Almost surely, 2^{21100020001211} is an apocalyptic number.

21100020001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100020001211 is an equidigital number, since it uses as much as digits as its factorization.

21100020001211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21100020001211 its reverse (11210002000112), we get a palindrome (32310022001323).

The spelling of 21100020001211 in words is "twenty-one trillion, one hundred billion, twenty million, one thousand, two hundred eleven".