1211010013203 has 4 divisors (see below), whose sum is σ = 1614680017608. Its totient is φ = 807340008800.

The previous prime is 1211010013183. The next prime is 1211010013219. The reversal of 1211010013203 is 3023100101121.

It is a happy number.

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 1211010013203 - 2¹³ = 1211010005011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211010013243) 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, 201835002198 + ... + 201835002203.

It is an arithmetic number, because the mean of its divisors is an integer number (403670004402).

Almost surely, 2^{1211010013203} is an apocalyptic number.

1211010013203 is a deficient number, since it is larger than the sum of its proper divisors (403670004405).

1211010013203 is an equidigital number, since it uses as much as digits as its factorization.

1211010013203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403670004404.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1211010013203 its reverse (3023100101121), we get a palindrome (4234110114324).

The spelling of 1211010013203 in words is "one trillion, two hundred eleven billion, ten million, thirteen thousand, two hundred three".