1222121121401 has 2 divisors, whose sum is σ = 1222121121402. Its totient is φ = 1222121121400.

The previous prime is 1222121121391. The next prime is 1222121121421. The reversal of 1222121121401 is 1041211212221.

It is an a-pointer prime, because the next prime (1222121121421) can be obtained adding 1222121121401 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846260165776 + 375860955625 = 919924^2 + 613075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222121121401 - 2²⁶ = 1222054012537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222121121421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060560700 + 611060560701.

It is an arithmetic number, because the mean of its divisors is an integer number (611060560701).

Almost surely, 2^{1222121121401} is an apocalyptic number.

It is an amenable number.

1222121121401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222121121401 is an equidigital number, since it uses as much as digits as its factorization.

1222121121401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1222121121401 its reverse (1041211212221), we get a palindrome (2263332333622).

The spelling of 1222121121401 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, four hundred one".