2123145029 has 4 divisors (see below), whose sum is σ = 2124706380. Its totient is φ = 2121583680.

The previous prime is 2123145007. The next prime is 2123145041. The reversal of 2123145029 is 9205413212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1141764100 + 981380929 = 33790^2 + 31327^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123145029 - 2¹² = 2123140933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123144992 and 2123145010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123945029) 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, 778634 + ... + 781355.

It is an arithmetic number, because the mean of its divisors is an integer number (531176595).

Almost surely, 2^2123145029 is an apocalyptic number.

It is an amenable number.

2123145029 is a deficient number, since it is larger than the sum of its proper divisors (1561351).

2123145029 is a wasteful number, since it uses less digits than its factorization.

2123145029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561350.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2123145029 is about 46077.5979083111. The cubic root of 2123145029 is about 1285.2665960106.

The spelling of 2123145029 in words is "two billion, one hundred twenty-three million, one hundred forty-five thousand, twenty-nine".