1213202011001 has 8 divisors (see below), whose sum is σ = 1218004506600. Its totient is φ = 1208400150528.

The previous prime is 1213202010973. The next prime is 1213202011027. The reversal of 1213202011001 is 1001102023121.

It can be written as a sum of positive squares in 4 ways, for example, as 749782810000 + 463419201001 = 865900^2 + 680749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213202011001 - 2¹⁰ = 1213202009977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213202016001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3870965 + ... + 4172621.

It is an arithmetic number, because the mean of its divisors is an integer number (152250563325).

Almost surely, 2^{1213202011001} is an apocalyptic number.

It is an amenable number.

1213202011001 is a deficient number, since it is larger than the sum of its proper divisors (4802495599).

1213202011001 is a wasteful number, since it uses less digits than its factorization.

1213202011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317563.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1213202011001 its reverse (1001102023121), we get a palindrome (2214304034122).

The spelling of 1213202011001 in words is "one trillion, two hundred thirteen billion, two hundred two million, eleven thousand, one".