20022111021 has 8 divisors (see below), whose sum is σ = 29123070624. Its totient is φ = 12134612720.

The previous prime is 20022111017. The next prime is 20022111071. The reversal of 20022111021 is 12011122002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20022111021 - 2² = 20022111017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20022110988 and 20022111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022111071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303365286 + ... + 303365351.

It is an arithmetic number, because the mean of its divisors is an integer number (3640383828).

Almost surely, 2^20022111021 is an apocalyptic number.

It is an amenable number.

20022111021 is a deficient number, since it is larger than the sum of its proper divisors (9100959603).

20022111021 is a wasteful number, since it uses less digits than its factorization.

20022111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606730651.

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

Adding to 20022111021 its reverse (12011122002), we get a palindrome (32033233023).

The spelling of 20022111021 in words is "twenty billion, twenty-two million, one hundred eleven thousand, twenty-one".