1012213157 has 2 divisors, whose sum is σ = 1012213158. Its totient is φ = 1012213156.

The previous prime is 1012213121. The next prime is 1012213171. The reversal of 1012213157 is 7513122101.

1012213157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949502596 + 62710561 = 30814^2 + 7919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012213157 - 2⁶ = 1012213093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012213117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506106578 + 506106579.

It is an arithmetic number, because the mean of its divisors is an integer number (506106579).

Almost surely, 2^1012213157 is an apocalyptic number.

It is an amenable number.

1012213157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012213157 is an equidigital number, since it uses as much as digits as its factorization.

1012213157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 1012213157 is about 31815.2975312192. The cubic root of 1012213157 is about 1004.0545904112.

Adding to 1012213157 its reverse (7513122101), we get a palindrome (8525335258).

The spelling of 1012213157 in words is "one billion, twelve million, two hundred thirteen thousand, one hundred fifty-seven".