1211011320198 has 16 divisors (see below), whose sum is σ = 2422255049280. Its totient is φ = 403631705256.

The previous prime is 1211011320149. The next prime is 1211011320199. The reversal of 1211011320198 is 8910231101121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211011320199) 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, 9615928 + ... + 9741051.

It is an arithmetic number, because the mean of its divisors is an integer number (151390940580).

Almost surely, 2^{1211011320198} is an apocalyptic number.

1211011320198 is an abundant number, since it is smaller than the sum of its proper divisors (1211243729082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211011320198 is a wasteful number, since it uses less digits than its factorization.

1211011320198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19367411.

The product of its (nonzero) digits is 864, while the sum is 30.

The spelling of 1211011320198 in words is "one trillion, two hundred eleven billion, eleven million, three hundred twenty thousand, one hundred ninety-eight".