20122200212121 has 40 divisors (see below), whose sum is σ = 36161310342080. Its totient is φ = 10893221161632.

The previous prime is 20122200212111. The next prime is 20122200212131. The reversal of 20122200212121 is 12121200222102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20122200212111) and next prime (20122200212131).

It is not a de Polignac number, because 20122200212121 - 2²² = 20122196017817 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20122200212094 and 20122200212103.

It is not an unprimeable number, because it can be changed into a prime (20122200212111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 933907366 + ... + 933928911.

It is an arithmetic number, because the mean of its divisors is an integer number (904032758552).

Almost surely, 2^{20122200212121} is an apocalyptic number.

20122200212121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20122200212121 is a deficient number, since it is larger than the sum of its proper divisors (16039110129959).

20122200212121 is a wasteful number, since it uses less digits than its factorization.

20122200212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867836315 (or 1867836306 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20122200212121 its reverse (12121200222102), we get a palindrome (32243400434223).

The spelling of 20122200212121 in words is "twenty trillion, one hundred twenty-two billion, two hundred million, two hundred twelve thousand, one hundred twenty-one".