1211199970 has 16 divisors (see below), whose sum is σ = 2189940480. Its totient is φ = 482306544.

The previous prime is 1211199953. The next prime is 1211199971. The reversal of 1211199970 is 799911121.

It is not an unprimeable number, because it can be changed into a prime (1211199971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269340 + ... + 273799.

It is an arithmetic number, because the mean of its divisors is an integer number (136871280).

Almost surely, 2^1211199970 is an apocalyptic number.

1211199970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211199970 is a deficient number, since it is larger than the sum of its proper divisors (978740510).

1211199970 is a wasteful number, since it uses less digits than its factorization.

1211199970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543369.

The product of its (nonzero) digits is 10206, while the sum is 40.

The square root of 1211199970 is about 34802.2983436439. The cubic root of 1211199970 is about 1065.9543767808.

The spelling of 1211199970 in words is "one billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred seventy".