202102011220 has 24 divisors (see below), whose sum is σ = 424739002464. Its totient is φ = 80778941856.

The previous prime is 202102011211. The next prime is 202102011257. The reversal of 202102011220 is 22110201202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 202102011220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3839622 + ... + 3891901.

It is an arithmetic number, because the mean of its divisors is an integer number (17697458436).

Almost surely, 2^202102011220 is an apocalyptic number.

202102011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102011220 is an abundant number, since it is smaller than the sum of its proper divisors (222636991244).

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

202102011220 is a wasteful number, since it uses less digits than its factorization.

202102011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732839 (or 7732837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202102011220 its reverse (22110201202), we get a palindrome (224212212422).

The spelling of 202102011220 in words is "two hundred two billion, one hundred two million, eleven thousand, two hundred twenty".