1213121031203 has 12 divisors (see below), whose sum is σ = 1344708260400. Its totient is φ = 1092119183232.

The previous prime is 1213121031181. The next prime is 1213121031257. The reversal of 1213121031203 is 3021301213121.

It is a happy number.

It is not a de Polignac number, because 1213121031203 - 2⁶ = 1213121031139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213121031293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91246628 + ... + 91259921.

It is an arithmetic number, because the mean of its divisors is an integer number (112059021700).

Almost surely, 2^{1213121031203} is an apocalyptic number.

1213121031203 is a deficient number, since it is larger than the sum of its proper divisors (131587229197).

1213121031203 is a wasteful number, since it uses less digits than its factorization.

1213121031203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182506606 (or 182506589 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213121031203 its reverse (3021301213121), we get a palindrome (4234422244324).

The spelling of 1213121031203 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, thirty-one thousand, two hundred three".