30626226221 has 2 divisors, whose sum is σ = 30626226222. Its totient is φ = 30626226220.

The previous prime is 30626226209. The next prime is 30626226251. The reversal of 30626226221 is 12262262603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30288181225 + 338044996 = 174035^2 + 18386^2 .

It is a cyclic number.

It is not a de Polignac number, because 30626226221 - 2²² = 30622031917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30626226251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15313113110 + 15313113111.

It is an arithmetic number, because the mean of its divisors is an integer number (15313113111).

Almost surely, 2^30626226221 is an apocalyptic number.

It is an amenable number.

30626226221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30626226221 is an equidigital number, since it uses as much as digits as its factorization.

30626226221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 30626226221 its reverse (12262262603), we get a palindrome (42888488824).

The spelling of 30626226221 in words is "thirty billion, six hundred twenty-six million, two hundred twenty-six thousand, two hundred twenty-one".