712122021 has 24 divisors (see below), whose sum is σ = 1155912576. Its totient is φ = 419173920.

The previous prime is 712121947. The next prime is 712122031. The reversal of 712122021 is 120221217.

It is a happy number.

712122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 712122021 - 2¹⁷ = 711990949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 712121985 and 712122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712122031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129625 + ... + 135006.

It is an arithmetic number, because the mean of its divisors is an integer number (48163024).

Almost surely, 2^712122021 is an apocalyptic number.

It is an amenable number.

712122021 is a deficient number, since it is larger than the sum of its proper divisors (443790555).

712122021 is a wasteful number, since it uses less digits than its factorization.

712122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264673 (or 264670 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 712122021 is about 26685.6144954543. The cubic root of 712122021 is about 893.0000267520. Note that the first 4 decimals are identical.

Adding to 712122021 its reverse (120221217), we get a palindrome (832343238).

The spelling of 712122021 in words is "seven hundred twelve million, one hundred twenty-two thousand, twenty-one".