20022221121 has 64 divisors (see below), whose sum is σ = 33014158848. Its totient is φ = 10533040128.

The previous prime is 20022221099. The next prime is 20022221143. The reversal of 20022221121 is 12112222002.

It is an interprime number because it is at equal distance from previous prime (20022221099) and next prime (20022221143).

It is not a de Polignac number, because 20022221121 - 2⁷ = 20022220993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20022221121.

It is not an unprimeable number, because it can be changed into a prime (20022221161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7056115 + ... + 7058951.

It is an arithmetic number, because the mean of its divisors is an integer number (515846232).

Almost surely, 2^20022221121 is an apocalyptic number.

20022221121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20022221121 is a deficient number, since it is larger than the sum of its proper divisors (12991937727).

20022221121 is a wasteful number, since it uses less digits than its factorization.

20022221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20022221121 its reverse (12112222002), we get a palindrome (32134443123).

The spelling of 20022221121 in words is "twenty billion, twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".