1221031010201 has 2 divisors, whose sum is σ = 1221031010202. Its totient is φ = 1221031010200.

The previous prime is 1221031010159. The next prime is 1221031010219. The reversal of 1221031010201 is 1020101301221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815726886976 + 405304123225 = 903176^2 + 636635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221031010201 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1221031010281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610515505100 + 610515505101.

It is an arithmetic number, because the mean of its divisors is an integer number (610515505101).

Almost surely, 2^{1221031010201} is an apocalyptic number.

It is an amenable number.

1221031010201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221031010201 is an equidigital number, since it uses as much as digits as its factorization.

1221031010201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1221031010201 its reverse (1020101301221), we get a palindrome (2241132311422).

The spelling of 1221031010201 in words is "one trillion, two hundred twenty-one billion, thirty-one million, ten thousand, two hundred one".