1230412021 has 2 divisors, whose sum is σ = 1230412022. Its totient is φ = 1230412020.

The previous prime is 1230411991. The next prime is 1230412031. The reversal of 1230412021 is 1202140321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788991921 + 441420100 = 28089^2 + 21010^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230412021 - 2¹³ = 1230403829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230411986 and 1230412004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230412031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615206010 + 615206011.

It is an arithmetic number, because the mean of its divisors is an integer number (615206011).

Almost surely, 2^1230412021 is an apocalyptic number.

It is an amenable number.

1230412021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230412021 is an equidigital number, since it uses as much as digits as its factorization.

1230412021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1230412021 is about 35077.2293803259. The cubic root of 1230412021 is about 1071.5608921894.

Adding to 1230412021 its reverse (1202140321), we get a palindrome (2432552342).

The spelling of 1230412021 in words is "one billion, two hundred thirty million, four hundred twelve thousand, twenty-one".