1221200937 has 12 divisors (see below), whose sum is σ = 1924316784. Its totient is φ = 740121720.

The previous prime is 1221200921. The next prime is 1221200957. The reversal of 1221200937 is 7390021221.

It is not a de Polignac number, because 1221200937 - 2⁴ = 1221200921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221200937.

It is not an unprimeable number, because it can be changed into a prime (1221200957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6167583 + ... + 6167780.

It is an arithmetic number, because the mean of its divisors is an integer number (160359732).

Almost surely, 2^1221200937 is an apocalyptic number.

It is an amenable number.

1221200937 is a deficient number, since it is larger than the sum of its proper divisors (703115847).

1221200937 is a wasteful number, since it uses less digits than its factorization.

1221200937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12335380 (or 12335377 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1221200937 is about 34945.6855276871. The cubic root of 1221200937 is about 1068.8802263392.

The spelling of 1221200937 in words is "one billion, two hundred twenty-one million, two hundred thousand, nine hundred thirty-seven".