20210122200220 has 96 divisors (see below), whose sum is σ = 45802865320128. Its totient is φ = 7463439040512.

The previous prime is 20210122200211. The next prime is 20210122200241. The reversal of 20210122200220 is 2200222101202.

It is a junction number, because it is equal to n+sod(n) for n = 20210122200194 and 20210122200203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1015239 + ... + 6438241.

It is an arithmetic number, because the mean of its divisors is an integer number (477113180418).

Almost surely, 2^{20210122200220} is an apocalyptic number.

20210122200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210122200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22901432660064).

20210122200220 is an abundant number, since it is smaller than the sum of its proper divisors (25592743119908).

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

20210122200220 is a wasteful number, since it uses less digits than its factorization.

20210122200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423239 (or 5423237 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20210122200220 its reverse (2200222101202), we get a palindrome (22410344301422).

The spelling of 20210122200220 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, two hundred thousand, two hundred twenty".