19121375138602 has 64 divisors (see below), whose sum is σ = 31666447411200. Its totient is φ = 8587481575680.

The previous prime is 19121375138549. The next prime is 19121375138717. The reversal of 19121375138602 is 20683157312191.

It is a super-2 number, since 2×19121375138602² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1298734413 + ... + 1298749135.

It is an arithmetic number, because the mean of its divisors is an integer number (494788240800).

Almost surely, 2^{19121375138602} is an apocalyptic number.

19121375138602 is a deficient number, since it is larger than the sum of its proper divisors (12545072272598).

19121375138602 is a wasteful number, since it uses less digits than its factorization.

19121375138602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16891.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 19121375138602 in words is "nineteen trillion, one hundred twenty-one billion, three hundred seventy-five million, one hundred thirty-eight thousand, six hundred two".