1020202121013 has 4 divisors (see below), whose sum is σ = 1360269494688. Its totient is φ = 680134747340.

The previous prime is 1020202120991. The next prime is 1020202121017. The reversal of 1020202121013 is 3101212020201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020202121013 - 2¹⁴ = 1020202104629 is a prime.

It is a super-2 number, since 2×1020202121013² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020202120983 and 1020202121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020202121017) 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, 170033686833 + ... + 170033686838.

It is an arithmetic number, because the mean of its divisors is an integer number (340067373672).

Almost surely, 2^{1020202121013} is an apocalyptic number.

It is an amenable number.

1020202121013 is a deficient number, since it is larger than the sum of its proper divisors (340067373675).

1020202121013 is an equidigital number, since it uses as much as digits as its factorization.

1020202121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340067373674.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1020202121013 its reverse (3101212020201), we get a palindrome (4121414141214).

The spelling of 1020202121013 in words is "one trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, thirteen".