10231012220 has 144 divisors (see below), whose sum is σ = 25538298240. Its totient is φ = 3419919360.

The previous prime is 10231012189. The next prime is 10231012229. The reversal of 10231012220 is 2221013201.

It is a happy number.

It is a super-2 number, since 2×10231012220² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10231012195 and 10231012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10231012229) 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, 9846461 + ... + 9847499.

Almost surely, 2^10231012220 is an apocalyptic number.

10231012220 is a gapful number since it is divisible by the number (10) 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 10231012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12769149120).

10231012220 is an abundant number, since it is smaller than the sum of its proper divisors (15307286020).

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

10231012220 is a wasteful number, since it uses less digits than its factorization.

10231012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10231012220 its reverse (2221013201), we get a palindrome (12452025421).

The spelling of 10231012220 in words is "ten billion, two hundred thirty-one million, twelve thousand, two hundred twenty".