1221013010201 has 2 divisors, whose sum is σ = 1221013010202. Its totient is φ = 1221013010200.

The previous prime is 1221013010177. The next prime is 1221013010213. The reversal of 1221013010201 is 1020103101221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 804207194176 + 416805816025 = 896776^2 + 645605^2 .

It is an emirp because it is prime and its reverse (1020103101221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221013010201 - 2⁶ = 1221013010137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221013010401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610506505100 + 610506505101.

It is an arithmetic number, because the mean of its divisors is an integer number (610506505101).

Almost surely, 2^{1221013010201} is an apocalyptic number.

It is an amenable number.

1221013010201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221013010201 is an equidigital number, since it uses as much as digits as its factorization.

1221013010201 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 1221013010201 its reverse (1020103101221), we get a palindrome (2241116111422).

The spelling of 1221013010201 in words is "one trillion, two hundred twenty-one billion, thirteen million, ten thousand, two hundred one".