1013201120021 has 4 divisors (see below), whose sum is σ = 1013255503692. Its totient is φ = 1013146736352.

The previous prime is 1013201119951. The next prime is 1013201120027. The reversal of 1013201120021 is 1200211023101.

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 11069985796 + 1002131134225 = 105214^2 + 1001065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013201120021 - 2²² = 1013196925717 is a prime.

It is a super-2 number, since 2×1013201120021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1013201119978 and 1013201120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013201120027) 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, 27163880 + ... + 27201153.

It is an arithmetic number, because the mean of its divisors is an integer number (253313875923).

Almost surely, 2^{1013201120021} is an apocalyptic number.

It is an amenable number.

1013201120021 is a deficient number, since it is larger than the sum of its proper divisors (54383671).

1013201120021 is an equidigital number, since it uses as much as digits as its factorization.

1013201120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54383670.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1013201120021 its reverse (1200211023101), we get a palindrome (2213412143122).

The spelling of 1013201120021 in words is "one trillion, thirteen billion, two hundred one million, one hundred twenty thousand, twenty-one".