1012020201021 has 4 divisors (see below), whose sum is σ = 1349360268032. Its totient is φ = 674680134012.

The previous prime is 1012020200959. The next prime is 1012020201043. The reversal of 1012020201021 is 1201020202101.

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 not a de Polignac number, because 1012020201021 - 2¹³ = 1012020192829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012020200988 and 1012020201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012020201821) 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, 168670033501 + ... + 168670033506.

It is an arithmetic number, because the mean of its divisors is an integer number (337340067008).

Almost surely, 2^{1012020201021} is an apocalyptic number.

It is an amenable number.

1012020201021 is a deficient number, since it is larger than the sum of its proper divisors (337340067011).

1012020201021 is an equidigital number, since it uses as much as digits as its factorization.

1012020201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337340067010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1012020201021 its reverse (1201020202101), we get a palindrome (2213040403122).

The spelling of 1012020201021 in words is "one trillion, twelve billion, twenty million, two hundred one thousand, twenty-one".