1212231020 has 192 divisors, whose sum is σ = 3449198592. Its totient is φ = 345600000.

The previous prime is 1212231011. The next prime is 1212231023. The reversal of 1212231020 is 201322121.

It is a happy number.

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 = 1212230986 and 1212231004.

It is not an unprimeable number, because it can be changed into a prime (1212231023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3022820 + ... + 3023220.

It is an arithmetic number, because the mean of its divisors is an integer number (17964576).

Almost surely, 2^1212231020 is an apocalyptic number.

1212231020 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 1212231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1724599296).

1212231020 is an abundant number, since it is smaller than the sum of its proper divisors (2236967572).

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

1212231020 is a wasteful number, since it uses less digits than its factorization.

1212231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 590 counting only the distinct ones).

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

The square root of 1212231020 is about 34817.1081510225. The cubic root of 1212231020 is about 1066.2567602501.

Adding to 1212231020 its reverse (201322121), we get a palindrome (1413553141).

It can be divided in two parts, 1212 and 231020, that added together give a palindrome (232232).

The spelling of 1212231020 in words is "one billion, two hundred twelve million, two hundred thirty-one thousand, twenty".