1011001100123 has 16 divisors (see below), whose sum is σ = 1218002154240. Its totient is φ = 819775144800.

The previous prime is 1011001100111. The next prime is 1011001100141. The reversal of 1011001100123 is 3210011001101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1011001100123 - 2⁶ = 1011001100059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011001100143) 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, 5408468 + ... + 5592273.

It is an arithmetic number, because the mean of its divisors is an integer number (76125134640).

Almost surely, 2^{1011001100123} is an apocalyptic number.

1011001100123 is a deficient number, since it is larger than the sum of its proper divisors (207001054117).

1011001100123 is a wasteful number, since it uses less digits than its factorization.

1011001100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001458.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 1011001100123 its reverse (3210011001101), we get a palindrome (4221012101224).

The spelling of 1011001100123 in words is "one trillion, eleven billion, one million, one hundred thousand, one hundred twenty-three".