1011201210198 has 40 divisors (see below), whose sum is σ = 2266188004080. Its totient is φ = 337015263600.

The previous prime is 1011201210197. The next prime is 1011201210203. The reversal of 1011201210198 is 8910121021101.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011201210197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 584848 + ... + 1537676.

It is an arithmetic number, because the mean of its divisors is an integer number (56654700102).

Almost surely, 2^{1011201210198} is an apocalyptic number.

1011201210198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1011201210198 is an abundant number, since it is smaller than the sum of its proper divisors (1254986793882).

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

1011201210198 is an equidigital number, since it uses as much as digits as its factorization.

1011201210198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959394 (or 959385 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 27.

Adding to 1011201210198 its reverse (8910121021101), we get a palindrome (9921322231299).

The spelling of 1011201210198 in words is "one trillion, eleven billion, two hundred one million, two hundred ten thousand, one hundred ninety-eight".