1221552135033 has 16 divisors (see below), whose sum is σ = 1668520135296. Its totient is φ = 794477509760.

The previous prime is 1221552135019. The next prime is 1221552135059. The reversal of 1221552135033 is 3305312551221.

It is a cyclic number.

It is not a de Polignac number, because 1221552135033 - 2²⁹ = 1221015264121 is a prime.

It is a super-2 number, since 2×1221552135033² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221552134985 and 1221552135003.

It is not an unprimeable number, because it can be changed into a prime (1221552137033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3681391 + ... + 3999467.

It is an arithmetic number, because the mean of its divisors is an integer number (104282508456).

Almost surely, 2^{1221552135033} is an apocalyptic number.

It is an amenable number.

1221552135033 is a deficient number, since it is larger than the sum of its proper divisors (446968000263).

1221552135033 is a wasteful number, since it uses less digits than its factorization.

1221552135033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349344.

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 1221552135033 its reverse (3305312551221), we get a palindrome (4526864686254).

The spelling of 1221552135033 in words is "one trillion, two hundred twenty-one billion, five hundred fifty-two million, one hundred thirty-five thousand, thirty-three".