1201011003121 has 4 divisors (see below), whose sum is σ = 1201066593652. Its totient is φ = 1200955412592.

The previous prime is 1201011003089. The next prime is 1201011003149. The reversal of 1201011003121 is 1213001101021.

It is a happy number.

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 961341030400 + 239669972721 = 980480^2 + 489561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201011003121 - 2⁵ = 1201011003089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201011001121) 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, 27762846 + ... + 27806071.

It is an arithmetic number, because the mean of its divisors is an integer number (300266648413).

Almost surely, 2^{1201011003121} is an apocalyptic number.

It is an amenable number.

1201011003121 is a deficient number, since it is larger than the sum of its proper divisors (55590531).

1201011003121 is an equidigital number, since it uses as much as digits as its factorization.

1201011003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55590530.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1201011003121 its reverse (1213001101021), we get a palindrome (2414012104142).

The spelling of 1201011003121 in words is "one trillion, two hundred one billion, eleven million, three thousand, one hundred twenty-one".