1212121104 has 40 divisors (see below), whose sum is σ = 3132820320. Its totient is φ = 403845888.

The previous prime is 1212121069. The next prime is 1212121121. The reversal of 1212121104 is 4011212121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122884 + ... + 132380.

It is an arithmetic number, because the mean of its divisors is an integer number (78320508).

Almost surely, 2^1212121104 is an apocalyptic number.

It is an amenable number.

1212121104 is an abundant number, since it is smaller than the sum of its proper divisors (1920699216).

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

1212121104 is a wasteful number, since it uses less digits than its factorization.

1212121104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12167 (or 12161 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1212121104 is about 34815.5296383668. The cubic root of 1212121104 is about 1066.2245325590.

Adding to 1212121104 its reverse (4011212121), we get a palindrome (5223333225).

The spelling of 1212121104 in words is "one billion, two hundred twelve million, one hundred twenty-one thousand, one hundred four".