10111212198 has 12 divisors (see below), whose sum is σ = 21907626468. Its totient is φ = 3370404060.

The previous prime is 10111212187. The next prime is 10111212203. The reversal of 10111212198 is 89121211101.

It is a super-2 number, since 2×10111212198² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280866988 + ... + 280867023.

It is an arithmetic number, because the mean of its divisors is an integer number (1825635539).

Almost surely, 2^10111212198 is an apocalyptic number.

10111212198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10111212198 is an abundant number, since it is smaller than the sum of its proper divisors (11796414270).

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

10111212198 is a wasteful number, since it uses less digits than its factorization.

10111212198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561734019 (or 561734016 counting only the distinct ones).

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

Adding to 10111212198 its reverse (89121211101), we get a palindrome (99232423299).

The spelling of 10111212198 in words is "ten billion, one hundred eleven million, two hundred twelve thousand, one hundred ninety-eight".