111023213212121 has 16 divisors (see below), whose sum is σ = 128832235284480. Its totient is φ = 93702540214800.

The previous prime is 111023213212103. The next prime is 111023213212129. The reversal of 111023213212121 is 121212312320111.

It is a cyclic number.

It is not a de Polignac number, because 111023213212121 - 2²² = 111023209017817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111023213212129) 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, 49242611 + ... + 51447848.

It is an arithmetic number, because the mean of its divisors is an integer number (8052014705280).

Almost surely, 2^{111023213212121} is an apocalyptic number.

It is an amenable number.

111023213212121 is a deficient number, since it is larger than the sum of its proper divisors (17809022072359).

111023213212121 is a wasteful number, since it uses less digits than its factorization.

111023213212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100692884.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 111023213212121 its reverse (121212312320111), we get a palindrome (232235525532232).

The spelling of 111023213212121 in words is "one hundred eleven trillion, twenty-three billion, two hundred thirteen million, two hundred twelve thousand, one hundred twenty-one".