20122121102220 has 144 divisors (see below), whose sum is σ = 64251325014240. Its totient is φ = 5083345133568.

The previous prime is 20122121102207. The next prime is 20122121102267. The reversal of 20122121102220 is 2220112122102.

It is a happy number.

20122121102220 is a `hidden beast` number, since 201 + 22 + 121 + 102 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20122121102193 and 20122121102202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196574892 + ... + 196677228.

Almost surely, 2^{20122121102220} is an apocalyptic number.

20122121102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122121102220 is an abundant number, since it is smaller than the sum of its proper divisors (44129203912020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20122121102220 is a wasteful number, since it uses less digits than its factorization.

20122121102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159864 (or 159859 counting only the distinct ones).

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

Adding to 20122121102220 its reverse (2220112122102), we get a palindrome (22342233224322).

The spelling of 20122121102220 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty".