1221034501333 has 4 divisors (see below), whose sum is σ = 1263139139340. Its totient is φ = 1178929863328.

The previous prime is 1221034501327. The next prime is 1221034501339. The reversal of 1221034501333 is 3331054301221.

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

It is an interprime number because it is at equal distance from previous prime (1221034501327) and next prime (1221034501339).

It can be written as a sum of positive squares in 2 ways, for example, as 979955465329 + 241079036004 = 989927^2 + 490998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221034501333 - 2⁹ = 1221034500821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221034501339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21052318960 + ... + 21052319017.

It is an arithmetic number, because the mean of its divisors is an integer number (315784784835).

Almost surely, 2^{1221034501333} is an apocalyptic number.

It is an amenable number.

1221034501333 is a deficient number, since it is larger than the sum of its proper divisors (42104638007).

1221034501333 is an equidigital number, since it uses as much as digits as its factorization.

1221034501333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42104638006.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 1221034501333 its reverse (3331054301221), we get a palindrome (4552088802554).

The spelling of 1221034501333 in words is "one trillion, two hundred twenty-one billion, thirty-four million, five hundred one thousand, three hundred thirty-three".