1001120212021 has 16 divisors (see below), whose sum is σ = 1023994718208. Its totient is φ = 978312470400.

The previous prime is 1001120211929. The next prime is 1001120212049. The reversal of 1001120212021 is 1202120211001.

It is a cyclic number.

It is not a de Polignac number, because 1001120212021 - 2¹³ = 1001120203829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001120211992 and 1001120212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001120212051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103942876 + ... + 103952506.

It is an arithmetic number, because the mean of its divisors is an integer number (63999669888).

Almost surely, 2^{1001120212021} is an apocalyptic number.

It is an amenable number.

1001120212021 is a deficient number, since it is larger than the sum of its proper divisors (22874506187).

1001120212021 is a wasteful number, since it uses less digits than its factorization.

1001120212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12852.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1001120212021 its reverse (1202120211001), we get a palindrome (2203240423022).

It can be divided in two parts, 1001 and 120212021, that multiplied together give a palindrome (120332233021).

The spelling of 1001120212021 in words is "one trillion, one billion, one hundred twenty million, two hundred twelve thousand, twenty-one".