1221248938 has 16 divisors (see below), whose sum is σ = 2254613760. Its totient is φ = 483131376.

The previous prime is 1221248933. The next prime is 1221248981. The reversal of 1221248938 is 8398421221.

It is a super-2 number, since 2×1221248938² = 2982897937132255688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221248938.

It is not an unprimeable number, because it can be changed into a prime (1221248933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3354898 + ... + 3355261.

It is an arithmetic number, because the mean of its divisors is an integer number (140913360).

Almost surely, 2^1221248938 is an apocalyptic number.

1221248938 is a deficient number, since it is larger than the sum of its proper divisors (1033364822).

1221248938 is a wasteful number, since it uses less digits than its factorization.

1221248938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6710181.

The product of its digits is 55296, while the sum is 40.

The square root of 1221248938 is about 34946.3723153062. The cubic root of 1221248938 is about 1068.8942307633.

The spelling of 1221248938 in words is "one billion, two hundred twenty-one million, two hundred forty-eight thousand, nine hundred thirty-eight".