202111212112220 has 48 divisors (see below), whose sum is σ = 424856143595520. Its totient is φ = 80763995137344.

The previous prime is 202111212112211. The next prime is 202111212112231. The reversal of 202111212112220 is 22211212111202.

202111212112220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×202111212112220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 202111212112192 and 202111212112201.

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, 699040127 + ... + 699329193.

It is an arithmetic number, because the mean of its divisors is an integer number (8851169658240).

Almost surely, 2^{202111212112220} is an apocalyptic number.

202111212112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202111212112220 is an abundant number, since it is smaller than the sum of its proper divisors (222744931483300).

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

202111212112220 is a wasteful number, since it uses less digits than its factorization.

202111212112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323762 (or 323760 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 202111212112220 its reverse (22211212111202), we get a palindrome (224322424223422).

The spelling of 202111212112220 in words is "two hundred two trillion, one hundred eleven billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty".