21000211303153 has 2 divisors, whose sum is σ = 21000211303154. Its totient is φ = 21000211303152.

The previous prime is 21000211303081. The next prime is 21000211303171. The reversal of 21000211303153 is 35130311200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20958706612624 + 41504690529 = 4578068^2 + 203727^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000211303153 - 2⁹ = 21000211302641 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000211306153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500105651576 + 10500105651577.

It is an arithmetic number, because the mean of its divisors is an integer number (10500105651577).

Almost surely, 2^{21000211303153} is an apocalyptic number.

It is an amenable number.

21000211303153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000211303153 is an equidigital number, since it uses as much as digits as its factorization.

21000211303153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 21000211303153 its reverse (35130311200012), we get a palindrome (56130522503165).

The spelling of 21000211303153 in words is "twenty-one trillion, two hundred eleven million, three hundred three thousand, one hundred fifty-three".