202011211220 has 144 divisors (see below), whose sum is σ = 554551982208. Its totient is φ = 61153424640.

The previous prime is 202011211201. The next prime is 202011211223. The reversal of 202011211220 is 22112110202.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 202011211195 and 202011211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202011211223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51686 + ... + 637725.

It is an arithmetic number, because the mean of its divisors is an integer number (3851055432).

Almost surely, 2^202011211220 is an apocalyptic number.

202011211220 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 202011211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277275991104).

202011211220 is an abundant number, since it is smaller than the sum of its proper divisors (352540770988).

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

202011211220 is a wasteful number, since it uses less digits than its factorization.

202011211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689470 (or 689461 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202011211220 its reverse (22112110202), we get a palindrome (224123321422).

The spelling of 202011211220 in words is "two hundred two billion, eleven million, two hundred eleven thousand, two hundred twenty".