111021222120198 has 32 divisors (see below), whose sum is σ = 239340611141856. Its totient is φ = 34129236196608.

The previous prime is 111021222120197. The next prime is 111021222120199. The reversal of 111021222120198 is 891021222120111.

It is an interprime number because it is at equal distance from previous prime (111021222120197) and next prime (111021222120199).

It is a super-2 number, since 2×111021222120198² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021222120197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 648660561 + ... + 648831692.

It is an arithmetic number, because the mean of its divisors is an integer number (7479394098183).

Almost surely, 2^{111021222120198} is an apocalyptic number.

111021222120198 is an abundant number, since it is smaller than the sum of its proper divisors (128319389021658).

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

111021222120198 is a wasteful number, since it uses less digits than its factorization.

111021222120198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297493368.

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 111021222120198 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, one hundred ninety-eight".