212122020220 has 48 divisors (see below), whose sum is σ = 490410597600. Its totient is φ = 76427608320.

The previous prime is 212122020217. The next prime is 212122020233. The reversal of 212122020220 is 22020221212.

It is a junction number, because it is equal to n+sod(n) for n = 212122020194 and 212122020203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4398915 + ... + 4446874.

It is an arithmetic number, because the mean of its divisors is an integer number (10216887450).

Almost surely, 2^212122020220 is an apocalyptic number.

212122020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122020220 is an abundant number, since it is smaller than the sum of its proper divisors (278288577380).

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

212122020220 is a wasteful number, since it uses less digits than its factorization.

212122020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845918 (or 8845916 counting only the distinct ones).

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

Adding to 212122020220 its reverse (22020221212), we get a palindrome (234142241432).

The spelling of 212122020220 in words is "two hundred twelve billion, one hundred twenty-two million, twenty thousand, two hundred twenty".