21214031400461 has 2 divisors, whose sum is σ = 21214031400462. Its totient is φ = 21214031400460.

The previous prime is 21214031400433. The next prime is 21214031400469. The reversal of 21214031400461 is 16400413041212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20767105724836 + 446925675625 = 4557094^2 + 668525^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214031400461 - 2¹⁰ = 21214031399437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214031400469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607015700230 + 10607015700231.

It is an arithmetic number, because the mean of its divisors is an integer number (10607015700231).

Almost surely, 2^{21214031400461} is an apocalyptic number.

It is an amenable number.

21214031400461 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214031400461 is an equidigital number, since it uses as much as digits as its factorization.

21214031400461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 21214031400461 its reverse (16400413041212), we get a palindrome (37614444441673).

The spelling of 21214031400461 in words is "twenty-one trillion, two hundred fourteen billion, thirty-one million, four hundred thousand, four hundred sixty-one".