21000200111131 has 2 divisors, whose sum is σ = 21000200111132. Its totient is φ = 21000200111130.

The previous prime is 21000200111123. The next prime is 21000200111141. The reversal of 21000200111131 is 13111100200012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000200111131 - 2³ = 21000200111123 is a prime.

It is a super-2 number, since 2×21000200111131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21000200111141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500100055565 + 10500100055566.

It is an arithmetic number, because the mean of its divisors is an integer number (10500100055566).

Almost surely, 2^{21000200111131} is an apocalyptic number.

21000200111131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000200111131 is an equidigital number, since it uses as much as digits as its factorization.

21000200111131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21000200111131 its reverse (13111100200012), we get a palindrome (34111300311143).

The spelling of 21000200111131 in words is "twenty-one trillion, two hundred million, one hundred eleven thousand, one hundred thirty-one".