1201211021013 has 16 divisors (see below), whose sum is σ = 1671519791616. Its totient is φ = 765866035440.

The previous prime is 1201211020913. The next prime is 1201211021041. The reversal of 1201211021013 is 3101201121021.

It is not a de Polignac number, because 1201211021013 - 2²¹ = 1201208923861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201211020983 and 1201211021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201211021063) 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, 972895 + ... + 1830012.

It is an arithmetic number, because the mean of its divisors is an integer number (104469986976).

Almost surely, 2^{1201211021013} is an apocalyptic number.

It is an amenable number.

1201211021013 is a deficient number, since it is larger than the sum of its proper divisors (470308770603).

1201211021013 is a wasteful number, since it uses less digits than its factorization.

1201211021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809144.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1201211021013 its reverse (3101201121021), we get a palindrome (4302412142034).

The spelling of 1201211021013 in words is "one trillion, two hundred one billion, two hundred eleven million, twenty-one thousand, thirteen".