1212138084 has 24 divisors (see below), whose sum is σ = 2888500608. Its totient is φ = 395449120.

The previous prime is 1212138077. The next prime is 1212138119. The reversal of 1212138084 is 4808312121.

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, 1074027 + ... + 1075154.

It is an arithmetic number, because the mean of its divisors is an integer number (120354192).

Almost surely, 2^1212138084 is an apocalyptic number.

It is an amenable number.

1212138084 is an abundant number, since it is smaller than the sum of its proper divisors (1676362524).

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

1212138084 is a wasteful number, since it uses less digits than its factorization.

1212138084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149235 (or 2149233 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 1212138084 is about 34815.7734942081. The cubic root of 1212138084 is about 1066.2295112717.

It can be divided in two parts, 12121 and 38084, that multiplied together give a palindrome (461616164).

The spelling of 1212138084 in words is "one billion, two hundred twelve million, one hundred thirty-eight thousand, eighty-four".