1202123231101 has 4 divisors (see below), whose sum is σ = 1294594248892. Its totient is φ = 1109652213312.

The previous prime is 1202123231077. The next prime is 1202123231107. The reversal of 1202123231101 is 1011323212021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 415444702500 + 786678528601 = 644550^2 + 886949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202123231101 - 2⁹ = 1202123230589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202123231107) 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, 46235508876 + ... + 46235508901.

It is an arithmetic number, because the mean of its divisors is an integer number (323648562223).

Almost surely, 2^{1202123231101} is an apocalyptic number.

It is an amenable number.

1202123231101 is a deficient number, since it is larger than the sum of its proper divisors (92471017791).

1202123231101 is an equidigital number, since it uses as much as digits as its factorization.

1202123231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92471017790.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1202123231101 its reverse (1011323212021), we get a palindrome (2213446443122).

The spelling of 1202123231101 in words is "one trillion, two hundred two billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred one".