1201000121023 has 4 divisors (see below), whose sum is σ = 1205274143088. Its totient is φ = 1196726098960.

The previous prime is 1201000121021. The next prime is 1201000121029. The reversal of 1201000121023 is 3201210001021.

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 1201000121023 - 2¹ = 1201000121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201000120994 and 1201000121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201000121021) 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, 2137010611 + ... + 2137011172.

It is an arithmetic number, because the mean of its divisors is an integer number (301318535772).

Almost surely, 2^{1201000121023} is an apocalyptic number.

1201000121023 is a deficient number, since it is larger than the sum of its proper divisors (4274022065).

1201000121023 is an equidigital number, since it uses as much as digits as its factorization.

1201000121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274022064.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1201000121023 its reverse (3201210001021), we get a palindrome (4402210122044).

The spelling of 1201000121023 in words is "one trillion, two hundred one billion, one hundred twenty-one thousand, twenty-three".