1011233121203 has 4 divisors (see below), whose sum is σ = 1011464370288. Its totient is φ = 1011001872120.

The previous prime is 1011233121191. The next prime is 1011233121209. The reversal of 1011233121203 is 3021213321101.

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 1011233121203 - 2⁴ = 1011233121187 is a prime.

It is a super-2 number, since 2×1011233121203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011233121209) 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, 115617983 + ... + 115626728.

It is an arithmetic number, because the mean of its divisors is an integer number (252866092572).

Almost surely, 2^{1011233121203} is an apocalyptic number.

1011233121203 is a deficient number, since it is larger than the sum of its proper divisors (231249085).

1011233121203 is an equidigital number, since it uses as much as digits as its factorization.

1011233121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231249084.

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

Adding to 1011233121203 its reverse (3021213321101), we get a palindrome (4032446442304).

The spelling of 1011233121203 in words is "one trillion, eleven billion, two hundred thirty-three million, one hundred twenty-one thousand, two hundred three".