10203212220 has 48 divisors (see below), whose sum is σ = 28615251840. Its totient is φ = 2716451136.

The previous prime is 10203212209. The next prime is 10203212221. The reversal of 10203212220 is 2221230201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10203212220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100222 + ... + 174501.

It is an arithmetic number, because the mean of its divisors is an integer number (596151080).

Almost surely, 2^10203212220 is an apocalyptic number.

10203212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10203212220 is an abundant number, since it is smaller than the sum of its proper divisors (18412039620).

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

10203212220 is a wasteful number, since it uses less digits than its factorization.

10203212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275354 (or 275352 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 10203212220 its reverse (2221230201), we get a palindrome (12424442421).

The spelling of 10203212220 in words is "ten billion, two hundred three million, two hundred twelve thousand, two hundred twenty".