1211552998 has 16 divisors (see below), whose sum is σ = 1831067280. Its totient is φ = 601214976.

The previous prime is 1211552921. The next prime is 1211552999. The reversal of 1211552998 is 8992551121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211552999) 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, 141298 + ... + 149626.

It is an arithmetic number, because the mean of its divisors is an integer number (114441705).

Almost surely, 2^1211552998 is an apocalyptic number.

1211552998 is a deficient number, since it is larger than the sum of its proper divisors (619514282).

1211552998 is a wasteful number, since it uses less digits than its factorization.

1211552998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8871.

The product of its digits is 64800, while the sum is 43.

The square root of 1211552998 is about 34807.3698805296. The cubic root of 1211552998 is about 1066.0579311610.

The spelling of 1211552998 in words is "one billion, two hundred eleven million, five hundred fifty-two thousand, nine hundred ninety-eight".