421120931 has 16 divisors (see below), whose sum is σ = 526929408. Its totient is φ = 326961600.

The previous prime is 421120927. The next prime is 421120969. The reversal of 421120931 is 139021124.

It is not a de Polignac number, because 421120931 - 2² = 421120927 is a prime.

It is a super-2 number, since 2×421120931² = 354685677052613522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421120897 and 421120906.

It is not an unprimeable number, because it can be changed into a prime (421120901) 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, 11906 + ... + 31368.

It is an arithmetic number, because the mean of its divisors is an integer number (32933088).

Almost surely, 2^421120931 is an apocalyptic number.

421120931 is a deficient number, since it is larger than the sum of its proper divisors (105808477).

421120931 is a wasteful number, since it uses less digits than its factorization.

421120931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19762.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 421120931 is about 20521.2312252457. The cubic root of 421120931 is about 749.5528777916.

The spelling of 421120931 in words is "four hundred twenty-one million, one hundred twenty thousand, nine hundred thirty-one".