20022121202101 has 4 divisors (see below), whose sum is σ = 20892648210912. Its totient is φ = 19151594193292.

The previous prime is 20022121202023. The next prime is 20022121202129. The reversal of 20022121202101 is 10120212122002.

It is a happy number.

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 20022121202101 - 2¹⁹ = 20022120677813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022121202401) 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, 435263504371 + ... + 435263504416.

It is an arithmetic number, because the mean of its divisors is an integer number (5223162052728).

Almost surely, 2^{20022121202101} is an apocalyptic number.

It is an amenable number.

20022121202101 is a deficient number, since it is larger than the sum of its proper divisors (870527008811).

20022121202101 is an equidigital number, since it uses as much as digits as its factorization.

20022121202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870527008810.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20022121202101 its reverse (10120212122002), we get a palindrome (30142333324103).

The spelling of 20022121202101 in words is "twenty trillion, twenty-two billion, one hundred twenty-one million, two hundred two thousand, one hundred one".