1221101033333 has 4 divisors (see below), whose sum is σ = 1292930505900. Its totient is φ = 1149271560768.

The previous prime is 1221101033329. The next prime is 1221101033351. The reversal of 1221101033333 is 3333301011221.

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 368908034884 + 852192998449 = 607378^2 + 923143^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221101033333 - 2² = 1221101033329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221101033299 and 1221101033308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101033323) 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, 35914736258 + ... + 35914736291.

It is an arithmetic number, because the mean of its divisors is an integer number (323232626475).

Almost surely, 2^{1221101033333} is an apocalyptic number.

It is an amenable number.

1221101033333 is a deficient number, since it is larger than the sum of its proper divisors (71829472567).

1221101033333 is an equidigital number, since it uses as much as digits as its factorization.

1221101033333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71829472566.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1221101033333 its reverse (3333301011221), we get a palindrome (4554402044554).

The spelling of 1221101033333 in words is "one trillion, two hundred twenty-one billion, one hundred one million, thirty-three thousand, three hundred thirty-three".