221210930953 has 2 divisors, whose sum is σ = 221210930954. Its totient is φ = 221210930952.

The previous prime is 221210930893. The next prime is 221210930971. The reversal of 221210930953 is 359039012122.

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., 210541487104 + 10669443849 = 458848^2 + 103293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221210930953 is a prime.

It is not a weakly prime, because it can be changed into another prime (221210930053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605465476 + 110605465477.

It is an arithmetic number, because the mean of its divisors is an integer number (110605465477).

Almost surely, 2^221210930953 is an apocalyptic number.

It is an amenable number.

221210930953 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210930953 is an equidigital number, since it uses as much as digits as its factorization.

221210930953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 221210930953 in words is "two hundred twenty-one billion, two hundred ten million, nine hundred thirty thousand, nine hundred fifty-three".