1101211321123 has 4 divisors (see below), whose sum is σ = 1124641349280. Its totient is φ = 1077781292968.

The previous prime is 1101211321103. The next prime is 1101211321127. The reversal of 1101211321123 is 3211231121011.

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 1101211321123 - 2²⁵ = 1101177766691 is a prime.

It is a super-2 number, since 2×1101211321123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1101211321123.

It is not an unprimeable number, because it can be changed into a prime (1101211321127) 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, 11715014008 + ... + 11715014101.

It is an arithmetic number, because the mean of its divisors is an integer number (281160337320).

Almost surely, 2^{1101211321123} is an apocalyptic number.

1101211321123 is a deficient number, since it is larger than the sum of its proper divisors (23430028157).

1101211321123 is an equidigital number, since it uses as much as digits as its factorization.

1101211321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23430028156.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1101211321123 its reverse (3211231121011), we get a palindrome (4312442442134).

The spelling of 1101211321123 in words is "one trillion, one hundred one billion, two hundred eleven million, three hundred twenty-one thousand, one hundred twenty-three".