20211022001021 has 16 divisors (see below), whose sum is σ = 20298957177600. Its totient is φ = 20123313853440.

The previous prime is 20211022001017. The next prime is 20211022001033. The reversal of 20211022001021 is 12010022011202.

It is a cyclic number.

It is not a de Polignac number, because 20211022001021 - 2² = 20211022001017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211022000987 and 20211022001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211022051021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531891995 + ... + 531929991.

It is an arithmetic number, because the mean of its divisors is an integer number (1268684823600).

Almost surely, 2^{20211022001021} is an apocalyptic number.

It is an amenable number.

20211022001021 is a deficient number, since it is larger than the sum of its proper divisors (87935176579).

20211022001021 is a wasteful number, since it uses less digits than its factorization.

20211022001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40924.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20211022001021 its reverse (12010022011202), we get a palindrome (32221044012223).

The spelling of 20211022001021 in words is "twenty trillion, two hundred eleven billion, twenty-two million, one thousand, twenty-one".