20211012010221 has 4 divisors (see below), whose sum is σ = 26948016013632. Its totient is φ = 13474008006812.

The previous prime is 20211012010213. The next prime is 20211012010247. The reversal of 20211012010221 is 12201021011202.

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 20211012010221 - 2³ = 20211012010213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211012010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211012010261) 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, 3368502001701 + ... + 3368502001706.

It is an arithmetic number, because the mean of its divisors is an integer number (6737004003408).

Almost surely, 2^{20211012010221} is an apocalyptic number.

It is an amenable number.

20211012010221 is a deficient number, since it is larger than the sum of its proper divisors (6737004003411).

20211012010221 is an equidigital number, since it uses as much as digits as its factorization.

20211012010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6737004003410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20211012010221 its reverse (12201021011202), we get a palindrome (32412033021423).

The spelling of 20211012010221 in words is "twenty trillion, two hundred eleven billion, twelve million, ten thousand, two hundred twenty-one".