2103021111031 has 4 divisors (see below), whose sum is σ = 2103032172472. Its totient is φ = 2103010049592.

The previous prime is 2103021111013. The next prime is 2103021111041. The reversal of 2103021111031 is 1301111203012.

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 2103021111031 - 2⁷ = 2103021110903 is a prime.

It is a super-2 number, since 2×2103021111031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2103021110996 and 2103021111014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103021111041) 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, 5240460 + ... + 5627473.

It is an arithmetic number, because the mean of its divisors is an integer number (525758043118).

Almost surely, 2^{2103021111031} is an apocalyptic number.

2103021111031 is a deficient number, since it is larger than the sum of its proper divisors (11061441).

2103021111031 is a wasteful number, since it uses less digits than its factorization.

2103021111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061440.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 2103021111031 its reverse (1301111203012), we get a palindrome (3404132314043).

The spelling of 2103021111031 in words is "two trillion, one hundred three billion, twenty-one million, one hundred eleven thousand, thirty-one".