1212121274 has 48 divisors (see below), whose sum is σ = 2265274368. Its totient is φ = 473667264.

The previous prime is 1212121249. The next prime is 1212121279. The reversal of 1212121274 is 4721212121.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1212121279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5292992 + ... + 5293220.

It is an arithmetic number, because the mean of its divisors is an integer number (47193216).

Almost surely, 2^1212121274 is an apocalyptic number.

1212121274 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1212121274 is a deficient number, since it is larger than the sum of its proper divisors (1053153094).

1212121274 is a wasteful number, since it uses less digits than its factorization.

1212121274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 378 counting only the distinct ones).

The product of its digits is 448, while the sum is 23.

The square root of 1212121274 is about 34815.5320798060. The cubic root of 1212121274 is about 1066.2245824050.

Adding to 1212121274 its reverse (4721212121), we get a palindrome (5933333395).

The spelling of 1212121274 in words is "one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred seventy-four".