21213416200351 has 2 divisors, whose sum is σ = 21213416200352. Its totient is φ = 21213416200350.

The previous prime is 21213416200313. The next prime is 21213416200363. The reversal of 21213416200351 is 15300261431212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213416200351 - 2³³ = 21204826265759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213416200751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606708100175 + 10606708100176.

It is an arithmetic number, because the mean of its divisors is an integer number (10606708100176).

Almost surely, 2^{21213416200351} is an apocalyptic number.

21213416200351 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213416200351 is an equidigital number, since it uses as much as digits as its factorization.

21213416200351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 21213416200351 its reverse (15300261431212), we get a palindrome (36513677631563).

The spelling of 21213416200351 in words is "twenty-one trillion, two hundred thirteen billion, four hundred sixteen million, two hundred thousand, three hundred fifty-one".