1012212125 has 8 divisors (see below), whose sum is σ = 1263240888. Its totient is φ = 809769600.

The previous prime is 1012212121. The next prime is 1012212151. The reversal of 1012212125 is 5212122101.

1012212125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2815684 + 1009396441 = 1678^2 + 31771^2 .

It is not a de Polignac number, because 1012212125 - 2² = 1012212121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012212121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4048724 + ... + 4048973.

It is an arithmetic number, because the mean of its divisors is an integer number (157905111).

Almost surely, 2^1012212125 is an apocalyptic number.

It is an amenable number.

1012212125 is a deficient number, since it is larger than the sum of its proper divisors (251028763).

1012212125 is an frugal number, since it uses more digits than its factorization.

1012212125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097712 (or 8097702 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1012212125 is about 31815.2813126020. The cubic root of 1012212125 is about 1004.0542491837.

Adding to 1012212125 its reverse (5212122101), we get a palindrome (6224334226).

The spelling of 1012212125 in words is "one billion, twelve million, two hundred twelve thousand, one hundred twenty-five".