201220122020 has 12 divisors (see below), whose sum is σ = 422562256284. Its totient is φ = 80488048800.

The previous prime is 201220122007. The next prime is 201220122029. The reversal of 201220122020 is 20221022102.

It can be written as a sum of positive squares in 2 ways, for example, as 99613459456 + 101606662564 = 315616^2 + 318758^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201220121986 and 201220122004.

It is not an unprimeable number, because it can be changed into a prime (201220122029) 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, 5030503031 + ... + 5030503070.

It is an arithmetic number, because the mean of its divisors is an integer number (35213521357).

Almost surely, 2^201220122020 is an apocalyptic number.

201220122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220122020 is an abundant number, since it is smaller than the sum of its proper divisors (221342134264).

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

201220122020 is a wasteful number, since it uses less digits than its factorization.

201220122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061006110 (or 10061006108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 201220122020 its reverse (20221022102), we get a palindrome (221441144122).

The spelling of 201220122020 in words is "two hundred one billion, two hundred twenty million, one hundred twenty-two thousand, twenty".