1213221133001 has 2 divisors, whose sum is σ = 1213221133002. Its totient is φ = 1213221133000.

The previous prime is 1213221132971. The next prime is 1213221133021. The reversal of 1213221133001 is 1003311223121.

It is a happy number.

It is an a-pointer prime, because the next prime (1213221133021) can be obtained adding 1213221133001 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813696006601 + 399525126400 = 902051^2 + 632080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213221133001 - 2¹⁴ = 1213221116617 is a prime.

It is a super-3 number, since 3×1213221133001³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1213221133021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610566500 + 606610566501.

It is an arithmetic number, because the mean of its divisors is an integer number (606610566501).

Almost surely, 2^{1213221133001} is an apocalyptic number.

It is an amenable number.

1213221133001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213221133001 is an equidigital number, since it uses as much as digits as its factorization.

1213221133001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213221133001 its reverse (1003311223121), we get a palindrome (2216532356122).

The spelling of 1213221133001 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, one hundred thirty-three thousand, one".