21214533401 has 2 divisors, whose sum is σ = 21214533402. Its totient is φ = 21214533400.

The previous prime is 21214533349. The next prime is 21214533419. The reversal of 21214533401 is 10433541212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15098511376 + 6116022025 = 122876^2 + 78205^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214533401 - 2³⁰ = 20140791577 is a prime.

It is not a weakly prime, because it can be changed into another prime (21214523401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607266700 + 10607266701.

It is an arithmetic number, because the mean of its divisors is an integer number (10607266701).

Almost surely, 2^21214533401 is an apocalyptic number.

It is an amenable number.

21214533401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214533401 is an equidigital number, since it uses as much as digits as its factorization.

21214533401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 21214533401 in words is "twenty-one billion, two hundred fourteen million, five hundred thirty-three thousand, four hundred one".