1012625221 has 2 divisors, whose sum is σ = 1012625222. Its totient is φ = 1012625220.

The previous prime is 1012625171. The next prime is 1012625269. The reversal of 1012625221 is 1225262101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991557121 + 21068100 = 31489^2 + 4590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012625221 - 2⁹ = 1012624709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012625192 and 1012625201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012625291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506312610 + 506312611.

It is an arithmetic number, because the mean of its divisors is an integer number (506312611).

Almost surely, 2^1012625221 is an apocalyptic number.

It is an amenable number.

1012625221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012625221 is an equidigital number, since it uses as much as digits as its factorization.

1012625221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1012625221 is about 31821.7727507441. The cubic root of 1012625221 is about 1004.1908194975.

Adding to 1012625221 its reverse (1225262101), we get a palindrome (2237887322).

The spelling of 1012625221 in words is "one billion, twelve million, six hundred twenty-five thousand, two hundred twenty-one".