20022101101021 has 4 divisors (see below), whose sum is σ = 20892627235872. Its totient is φ = 19151574966172.

The previous prime is 20022101100997. The next prime is 20022101101027. The reversal of 20022101101021 is 12010110122002.

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 20022101101021 - 2²¹ = 20022099003869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022101100992 and 20022101101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022101101027) 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, 435263067391 + ... + 435263067436.

It is an arithmetic number, because the mean of its divisors is an integer number (5223156808968).

Almost surely, 2^{20022101101021} is an apocalyptic number.

It is an amenable number.

20022101101021 is a deficient number, since it is larger than the sum of its proper divisors (870526134851).

20022101101021 is an equidigital number, since it uses as much as digits as its factorization.

20022101101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870526134850.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20022101101021 its reverse (12010110122002), we get a palindrome (32032211223023).

The spelling of 20022101101021 in words is "twenty trillion, twenty-two billion, one hundred one million, one hundred one thousand, twenty-one".