1421723803173 has 16 divisors (see below), whose sum is σ = 1927135334016. Its totient is φ = 932070968640.

The previous prime is 1421723803169. The next prime is 1421723803183. The reversal of 1421723803173 is 3713083271241.

It is not a de Polignac number, because 1421723803173 - 2² = 1421723803169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421723803103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33361 + ... + 1686582.

It is an arithmetic number, because the mean of its divisors is an integer number (120445958376).

Almost surely, 2^{1421723803173} is an apocalyptic number.

It is an amenable number.

1421723803173 is a deficient number, since it is larger than the sum of its proper divisors (505411530843).

1421723803173 is a wasteful number, since it uses less digits than its factorization.

1421723803173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724524.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 1421723803173 in words is "one trillion, four hundred twenty-one billion, seven hundred twenty-three million, eight hundred three thousand, one hundred seventy-three".