1221012112301 has 2 divisors, whose sum is σ = 1221012112302. Its totient is φ = 1221012112300.

The previous prime is 1221012112247. The next prime is 1221012112303. The reversal of 1221012112301 is 1032112101221.

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., 1162666192900 + 58345919401 = 1078270^2 + 241549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221012112301 - 2⁶ = 1221012112237 is a prime.

Together with 1221012112303, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221012112301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221012112303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610506056150 + 610506056151.

It is an arithmetic number, because the mean of its divisors is an integer number (610506056151).

Almost surely, 2^{1221012112301} is an apocalyptic number.

It is an amenable number.

1221012112301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221012112301 is an equidigital number, since it uses as much as digits as its factorization.

1221012112301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1221012112301 its reverse (1032112101221), we get a palindrome (2253124213522).

The spelling of 1221012112301 in words is "one trillion, two hundred twenty-one billion, twelve million, one hundred twelve thousand, three hundred one".