21011212200151 has 2 divisors, whose sum is σ = 21011212200152. Its totient is φ = 21011212200150.

The previous prime is 21011212200133. The next prime is 21011212200157. The reversal of 21011212200151 is 15100221211012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011212200151 - 2⁵ = 21011212200119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011212200157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505606100075 + 10505606100076.

It is an arithmetic number, because the mean of its divisors is an integer number (10505606100076).

Almost surely, 2^{21011212200151} is an apocalyptic number.

21011212200151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011212200151 is an equidigital number, since it uses as much as digits as its factorization.

21011212200151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 21011212200151 its reverse (15100221211012), we get a palindrome (36111433411163).

The spelling of 21011212200151 in words is "twenty-one trillion, eleven billion, two hundred twelve million, two hundred thousand, one hundred fifty-one".