21000001211003 has 2 divisors, whose sum is σ = 21000001211004. Its totient is φ = 21000001211002.

The previous prime is 21000001210973. The next prime is 21000001211023. The reversal of 21000001211003 is 30011210000012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000001211003 - 2¹⁴ = 21000001194619 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000001211023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500000605501 + 10500000605502.

It is an arithmetic number, because the mean of its divisors is an integer number (10500000605502).

Almost surely, 2^{21000001211003} is an apocalyptic number.

21000001211003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000001211003 is an equidigital number, since it uses as much as digits as its factorization.

21000001211003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21000001211003 its reverse (30011210000012), we get a palindrome (51011211211015).

The spelling of 21000001211003 in words is "twenty-one trillion, one million, two hundred eleven thousand, three".