20002110022121 has 4 divisors (see below), whose sum is σ = 20007695647044. Its totient is φ = 19996524397200.

The previous prime is 20002110022087. The next prime is 20002110022133. The reversal of 20002110022121 is 12122001120002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17527117171600 + 2474992850521 = 4186540^2 + 1573211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002110022121 - 2⁶ = 20002110022057 is a prime.

It is a super-2 number, since 2×20002110022121² (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 = 20002110022096 and 20002110022105.

It is not an unprimeable number, because it can be changed into a prime (20002110021121) 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, 2792807090 + ... + 2792814251.

It is an arithmetic number, because the mean of its divisors is an integer number (5001923911761).

Almost surely, 2^{20002110022121} is an apocalyptic number.

It is an amenable number.

20002110022121 is a deficient number, since it is larger than the sum of its proper divisors (5585624923).

20002110022121 is an equidigital number, since it uses as much as digits as its factorization.

20002110022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585624922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20002110022121 its reverse (12122001120002), we get a palindrome (32124111142123).

The spelling of 20002110022121 in words is "twenty trillion, two billion, one hundred ten million, twenty-two thousand, one hundred twenty-one".