1212340220 has 96 divisors (see below), whose sum is σ = 3298444800. Its totient is φ = 363481344.

The previous prime is 1212340211. The next prime is 1212340253. The reversal of 1212340220 is 220432121.

It is a super-3 number, since 3×1212340220³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17051 + ... + 52109.

It is an arithmetic number, because the mean of its divisors is an integer number (34358800).

Almost surely, 2^1212340220 is an apocalyptic number.

1212340220 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 1212340220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649222400).

1212340220 is an abundant number, since it is smaller than the sum of its proper divisors (2086104580).

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

1212340220 is a wasteful number, since it uses less digits than its factorization.

1212340220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35107 (or 35105 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1212340220 is about 34818.6763102792. The cubic root of 1212340220 is about 1066.2887760788.

Adding to 1212340220 its reverse (220432121), we get a palindrome (1432772341).

The spelling of 1212340220 in words is "one billion, two hundred twelve million, three hundred forty thousand, two hundred twenty".