2101023 has 24 divisors (see below), whose sum is σ = 3191760. Its totient is φ = 1330560.

The previous prime is 2101019. The next prime is 2101051. The reversal of 2101023 is 3201012.

It is a happy number.

It is not a de Polignac number, because 2101023 - 2² = 2101019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2100996 and 2101014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23563 + ... + 23651.

It is an arithmetic number, because the mean of its divisors is an integer number (132990).

2^2101023 is an apocalyptic number.

2101023 is a deficient number, since it is larger than the sum of its proper divisors (1090737).

2101023 is a wasteful number, since it uses less digits than its factorization.

2101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2101023 is about 1449.4906001765. The cubic root of 2101023 is about 128.0787072895.

Adding to 2101023 its reverse (3201012), we get a palindrome (5302035).

It can be divided in two parts, 2 and 101023, that added together give a triangular number (101025 = T₄₄₉).

The spelling of 2101023 in words is "two million, one hundred one thousand, twenty-three".