121112212021111 has 8 divisors (see below), whose sum is σ = 122296365509760. Its totient is φ = 119929026378168.

The previous prime is 121112212021039. The next prime is 121112212021117. The reversal of 121112212021111 is 111120212211121.

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

It is a cyclic number.

It is not a de Polignac number, because 121112212021111 - 2⁷ = 121112212020983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112212021117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241709931 + ... + 242210476.

It is an arithmetic number, because the mean of its divisors is an integer number (15287045688720).

Almost surely, 2^{121112212021111} is an apocalyptic number.

121112212021111 is a deficient number, since it is larger than the sum of its proper divisors (1184153488649).

121112212021111 is a wasteful number, since it uses less digits than its factorization.

121112212021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483922853.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121112212021111 its reverse (111120212211121), we get a palindrome (232232424232232).

The spelling of 121112212021111 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twelve million, twenty-one thousand, one hundred eleven".