111021222120202 has 4 divisors (see below), whose sum is σ = 166531833180306. Its totient is φ = 55510611060100.

The previous prime is 111021222120199. The next prime is 111021222120311. The reversal of 111021222120202 is 202021222120111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 102164164001641 + 8857058118561 = 10107629^2 + 2976081^2 .

It is a super-2 number, since 2×111021222120202² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111021222120202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27755305530049 + ... + 27755305530052.

Almost surely, 2^{111021222120202} is an apocalyptic number.

111021222120202 is a deficient number, since it is larger than the sum of its proper divisors (55510611060104).

111021222120202 is an equidigital number, since it uses as much as digits as its factorization.

111021222120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55510611060103.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111021222120202 its reverse (202021222120111), we get a palindrome (313042444240313).

Subtracting 111021222120202 from its reverse (202021222120111), we obtain a palindrome (90999999999909).

The spelling of 111021222120202 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred two".