1212101988 has 24 divisors (see below), whose sum is σ = 2888414592. Its totient is φ = 395437344.

The previous prime is 1212101963. The next prime is 1212102013. The reversal of 1212101988 is 8891012121.

It is an interprime number because it is at equal distance from previous prime (1212101963) and next prime (1212102013).

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, 1073995 + ... + 1075122.

It is an arithmetic number, because the mean of its divisors is an integer number (120350608).

Almost surely, 2^1212101988 is an apocalyptic number.

It is an amenable number.

1212101988 is an abundant number, since it is smaller than the sum of its proper divisors (1676312604).

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

1212101988 is a wasteful number, since it uses less digits than its factorization.

1212101988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149171 (or 2149169 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The square root of 1212101988 is about 34815.2551046233. The cubic root of 1212101988 is about 1066.2189274933.

The spelling of 1212101988 in words is "one billion, two hundred twelve million, one hundred one thousand, nine hundred eighty-eight".