1373042121 has 16 divisors (see below), whose sum is σ = 1998151680. Its totient is φ = 831730320.

The previous prime is 1373042113. The next prime is 1373042131. The reversal of 1373042121 is 1212403731.

It is a happy number.

It is not a de Polignac number, because 1373042121 - 2³ = 1373042113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1373042091 and 1373042100.

It is not an unprimeable number, because it can be changed into a prime (1373042101) 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, 64596 + ... + 83178.

It is an arithmetic number, because the mean of its divisors is an integer number (124884480).

Almost surely, 2^1373042121 is an apocalyptic number.

1373042121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1373042121 is a deficient number, since it is larger than the sum of its proper divisors (625109559).

1373042121 is a wasteful number, since it uses less digits than its factorization.

1373042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20836.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1373042121 is about 37054.5829958994. The cubic root of 1373042121 is about 1111.4620025867.

Adding to 1373042121 its reverse (1212403731), we get a palindrome (2585445852).

The spelling of 1373042121 in words is "one billion, three hundred seventy-three million, forty-two thousand, one hundred twenty-one".