20022021021121 has 16 divisors (see below), whose sum is σ = 24086772120960. Its totient is φ = 16258395288960.

The previous prime is 20022021021061. The next prime is 20022021021137. The reversal of 20022021021121 is 12112012022002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20022021021121 - 2¹⁷ = 20022020890049 is a prime.

It is a super-2 number, since 2×20022021021121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022021021095 and 20022021021104.

It is not an unprimeable number, because it can be changed into a prime (20022021024121) 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, 37469595 + ... + 38000191.

It is an arithmetic number, because the mean of its divisors is an integer number (1505423257560).

Almost surely, 2^{20022021021121} is an apocalyptic number.

It is an amenable number.

20022021021121 is a deficient number, since it is larger than the sum of its proper divisors (4064751099839).

20022021021121 is a wasteful number, since it uses less digits than its factorization.

20022021021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814344.

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

Adding to 20022021021121 its reverse (12112012022002), we get a palindrome (32134033043123).

The spelling of 20022021021121 in words is "twenty trillion, twenty-two billion, twenty-one million, twenty-one thousand, one hundred twenty-one".