1100212121111 has 4 divisors (see below), whose sum is σ = 1102166317272. Its totient is φ = 1098257924952.

The previous prime is 1100212121101. The next prime is 1100212121117. The reversal of 1100212121111 is 1111212120011.

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

It is a cyclic number.

It is not a de Polignac number, because 1100212121111 - 2²⁶ = 1100145012247 is a prime.

It is a super-2 number, since 2×1100212121111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100212121117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977097236 + ... + 977098361.

It is an arithmetic number, because the mean of its divisors is an integer number (275541579318).

Almost surely, 2^{1100212121111} is an apocalyptic number.

1100212121111 is a deficient number, since it is larger than the sum of its proper divisors (1954196161).

1100212121111 is an equidigital number, since it uses as much as digits as its factorization.

1100212121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954196160.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1100212121111 its reverse (1111212120011), we get a palindrome (2211424241122).

The spelling of 1100212121111 in words is "one trillion, one hundred billion, two hundred twelve million, one hundred twenty-one thousand, one hundred eleven".