1212201982 has 16 divisors (see below), whose sum is σ = 1943639712. Its totient is φ = 565607680.

The previous prime is 1212201973. The next prime is 1212201997. The reversal of 1212201982 is 2891022121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212201982.

It is a congruent number.

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, 319483 + ... + 323254.

It is an arithmetic number, because the mean of its divisors is an integer number (121477482).

Almost surely, 2^1212201982 is an apocalyptic number.

1212201982 is a deficient number, since it is larger than the sum of its proper divisors (731437730).

1212201982 is a wasteful number, since it uses less digits than its factorization.

1212201982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642803.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1212201982 is about 34816.6911408882. The cubic root of 1212201982 is about 1066.2482464133.

The spelling of 1212201982 in words is "one billion, two hundred twelve million, two hundred one thousand, nine hundred eighty-two".