111212122121102 has 8 divisors (see below), whose sum is σ = 166953040245336. Its totient is φ = 55561108705992.

The previous prime is 111212122121021. The next prime is 111212122121147. The reversal of 111212122121102 is 201121221212111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×111212122121102² (a number of 29 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 3 ways as a sum of consecutive naturals, for example, 22476174188 + ... + 22476179135.

It is an arithmetic number, because the mean of its divisors is an integer number (20869130030667).

Almost surely, 2^{111212122121102} is an apocalyptic number.

111212122121102 is a deficient number, since it is larger than the sum of its proper divisors (55740918124234).

111212122121102 is a wasteful number, since it uses less digits than its factorization.

111212122121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44952354562.

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

Adding to 111212122121102 its reverse (201121221212111), we get a palindrome (312333343333213).

The spelling of 111212122121102 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred two".