21022201349 has 2 divisors, whose sum is σ = 21022201350. Its totient is φ = 21022201348.

The previous prime is 21022201283. The next prime is 21022201373. The reversal of 21022201349 is 94310222012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15233730625 + 5788470724 = 123425^2 + 76082^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022201349 - 2¹² = 21022197253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022291349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511100674 + 10511100675.

It is an arithmetic number, because the mean of its divisors is an integer number (10511100675).

Almost surely, 2^21022201349 is an apocalyptic number.

It is an amenable number.

21022201349 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022201349 is an equidigital number, since it uses as much as digits as its factorization.

21022201349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21022201349 in words is "twenty-one billion, twenty-two million, two hundred one thousand, three hundred forty-nine".