1012150021 has 2 divisors, whose sum is σ = 1012150022. Its totient is φ = 1012150020.

The previous prime is 1012149979. The next prime is 1012150033. The reversal of 1012150021 is 1200512101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670084996 + 342065025 = 25886^2 + 18495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012150021 - 2¹¹ = 1012147973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012149983 and 1012150010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012750021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506075010 + 506075011.

It is an arithmetic number, because the mean of its divisors is an integer number (506075011).

Almost surely, 2^1012150021 is an apocalyptic number.

It is an amenable number.

1012150021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012150021 is an equidigital number, since it uses as much as digits as its factorization.

1012150021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1012150021 is about 31814.3052886591. The cubic root of 1012150021 is about 1004.0337142719.

Adding to 1012150021 its reverse (1200512101), we get a palindrome (2212662122).

The spelling of 1012150021 in words is "one billion, twelve million, one hundred fifty thousand, twenty-one".