2145103345021 has 64 divisors (see below), whose sum is σ = 2857840312320. Its totient is φ = 1563782837760.

The previous prime is 2145103345009. The next prime is 2145103345043. The reversal of 2145103345021 is 1205433015412.

It is not a de Polignac number, because 2145103345021 - 2²¹ = 2145101247869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145103345051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6621016 + ... + 6937438.

It is an arithmetic number, because the mean of its divisors is an integer number (44653754880).

Almost surely, 2^{2145103345021} is an apocalyptic number.

It is an amenable number.

2145103345021 is a deficient number, since it is larger than the sum of its proper divisors (712736967299).

2145103345021 is a wasteful number, since it uses less digits than its factorization.

2145103345021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316586.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 2145103345021 in words is "two trillion, one hundred forty-five billion, one hundred three million, three hundred forty-five thousand, twenty-one".