921362121 has 20 divisors (see below), whose sum is σ = 1383510612. Its totient is φ = 611048448.

The previous prime is 921362119. The next prime is 921362131. The reversal of 921362121 is 121263129.

921362121 is a `hidden beast` number, since 9 + 2 + 13 + 621 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 81000000 + 840362121 = 9000^2 + 28989^2 .

It is not a de Polignac number, because 921362121 - 2¹ = 921362119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (921362131) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 13836 + ... + 45101.

Almost surely, 2^921362121 is an apocalyptic number.

It is an amenable number.

921362121 is a deficient number, since it is larger than the sum of its proper divisors (462148491).

921362121 is a wasteful number, since it uses less digits than its factorization.

921362121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59142 (or 59133 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 921362121 is about 30353.9473709763. The cubic root of 921362121 is about 973.0685836072.

The spelling of 921362121 in words is "nine hundred twenty-one million, three hundred sixty-two thousand, one hundred twenty-one".