1211020101203 has 4 divisors (see below), whose sum is σ = 1321112837688. Its totient is φ = 1100927364720.

The previous prime is 1211020101169. The next prime is 1211020101227. The reversal of 1211020101203 is 3021010201121.

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 1211020101203 - 2⁶ = 1211020101139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211020101103) 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, 55046368226 + ... + 55046368247.

It is an arithmetic number, because the mean of its divisors is an integer number (330278209422).

Almost surely, 2^{1211020101203} is an apocalyptic number.

1211020101203 is a deficient number, since it is larger than the sum of its proper divisors (110092736485).

1211020101203 is a wasteful number, since it uses less digits than its factorization.

1211020101203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110092736484.

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

Adding to 1211020101203 its reverse (3021010201121), we get a palindrome (4232030302324).

The spelling of 1211020101203 in words is "one trillion, two hundred eleven billion, twenty million, one hundred one thousand, two hundred three".