1212340100 has 36 divisors (see below), whose sum is σ = 2634901668. Its totient is φ = 484176000.

The previous prime is 1212340079. The next prime is 1212340109. The reversal of 1212340100 is 10432121.

It can be written as a sum of positive squares in 6 ways, for example, as 55115776 + 1157224324 = 7424^2 + 34018^2 .

It is not an unprimeable number, because it can be changed into a prime (1212340109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56930 + ... + 75270.

It is an arithmetic number, because the mean of its divisors is an integer number (73191713).

Almost surely, 2^1212340100 is an apocalyptic number.

1212340100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212340100 is an abundant number, since it is smaller than the sum of its proper divisors (1422561568).

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

1212340100 is a wasteful number, since it uses less digits than its factorization.

1212340100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19016 (or 19009 counting only the distinct ones).

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

The square root of 1212340100 is about 34818.6745870661. The cubic root of 1212340100 is about 1066.2887408977.

Adding to 1212340100 its reverse (10432121), we get a palindrome (1222772221).

The spelling of 1212340100 in words is "one billion, two hundred twelve million, three hundred forty thousand, one hundred".