1021133001221 has 16 divisors (see below), whose sum is σ = 1039790937600. Its totient is φ = 1002578475888.

The previous prime is 1021133001209. The next prime is 1021133001241. The reversal of 1021133001221 is 1221003311201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021133001221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021133001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021133001241) 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, 52401746 + ... + 52421228.

It is an arithmetic number, because the mean of its divisors is an integer number (64986933600).

Almost surely, 2^{1021133001221} is an apocalyptic number.

It is an amenable number.

1021133001221 is a deficient number, since it is larger than the sum of its proper divisors (18657936379).

1021133001221 is a wasteful number, since it uses less digits than its factorization.

1021133001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22088.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1021133001221 its reverse (1221003311201), we get a palindrome (2242136312422).

The spelling of 1021133001221 in words is "one trillion, twenty-one billion, one hundred thirty-three million, one thousand, two hundred twenty-one".