1122121100123 has 4 divisors (see below), whose sum is σ = 1141140101880. Its totient is φ = 1103102098368.

The previous prime is 1122121100119. The next prime is 1122121100143. The reversal of 1122121100123 is 3210011212211.

It is a happy number.

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 1122121100123 - 2² = 1122121100119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122121100143) 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, 9509500790 + ... + 9509500907.

It is an arithmetic number, because the mean of its divisors is an integer number (285285025470).

Almost surely, 2^{1122121100123} is an apocalyptic number.

1122121100123 is a deficient number, since it is larger than the sum of its proper divisors (19019001757).

1122121100123 is an equidigital number, since it uses as much as digits as its factorization.

1122121100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019001756.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1122121100123 its reverse (3210011212211), we get a palindrome (4332132312334).

The spelling of 1122121100123 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-three".