111120221212121 has 32 divisors (see below), whose sum is σ = 129626995078656. Its totient is φ = 94132303360000.

The previous prime is 111120221212111. The next prime is 111120221212127. The reversal of 111120221212121 is 121212122021111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111120221212121 - 2³⁰ = 111119147470297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111120221212093 and 111120221212102.

It is not an unprimeable number, because it can be changed into a prime (111120221212127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1277303201 + ... + 1277390193.

It is an arithmetic number, because the mean of its divisors is an integer number (4050843596208).

Almost surely, 2^{111120221212121} is an apocalyptic number.

111120221212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111120221212121 is a deficient number, since it is larger than the sum of its proper divisors (18506773866535).

111120221212121 is a wasteful number, since it uses less digits than its factorization.

111120221212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154753.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111120221212121 its reverse (121212122021111), we get a palindrome (232332343233232).

The spelling of 111120221212121 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".