19701121 has 16 divisors (see below), whose sum is σ = 22435200. Its totient is φ = 17136000.

The previous prime is 19701091. The next prime is 19701127. The reversal of 19701121 is 12110791.

It is a cyclic number.

It is not a de Polignac number, because 19701121 - 2¹⁷ = 19570049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19701092 and 19701101.

It is not an unprimeable number, because it can be changed into a prime (19701127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47965 + ... + 48373.

It is an arithmetic number, because the mean of its divisors is an integer number (1402200).

Almost surely, 2^19701121 is an apocalyptic number.

19701121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19701121 is a deficient number, since it is larger than the sum of its proper divisors (2734079).

19701121 is a wasteful number, since it uses less digits than its factorization.

19701121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 19701121 is about 4438.5944847440. The cubic root of 19701121 is about 270.0828323816.

The spelling of 19701121 in words is "nineteen million, seven hundred one thousand, one hundred twenty-one".