1221202301401 has 4 divisors (see below), whose sum is σ = 1221204549172. Its totient is φ = 1221200053632.

The previous prime is 1221202301393. The next prime is 1221202301411. The reversal of 1221202301401 is 1041032021221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1132838793801 + 88363507600 = 1064349^2 + 297260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221202301401 - 2³ = 1221202301393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221202301411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254845 + ... + 1583461.

It is an arithmetic number, because the mean of its divisors is an integer number (305301137293).

Almost surely, 2^{1221202301401} is an apocalyptic number.

It is an amenable number.

1221202301401 is a deficient number, since it is larger than the sum of its proper divisors (2247771).

1221202301401 is an equidigital number, since it uses as much as digits as its factorization.

1221202301401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247770.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1221202301401 its reverse (1041032021221), we get a palindrome (2262234322622).

The spelling of 1221202301401 in words is "one trillion, two hundred twenty-one billion, two hundred two million, three hundred one thousand, four hundred one".