1012021200251 has 2 divisors, whose sum is σ = 1012021200252. Its totient is φ = 1012021200250.

The previous prime is 1012021200199. The next prime is 1012021200257. The reversal of 1012021200251 is 1520021202101.

1012021200251 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 is a cyclic number.

It is not a de Polignac number, because 1012021200251 - 2³⁰ = 1010947458427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1012021200257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010600125 + 506010600126.

It is an arithmetic number, because the mean of its divisors is an integer number (506010600126).

Almost surely, 2^{1012021200251} is an apocalyptic number.

1012021200251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012021200251 is an equidigital number, since it uses as much as digits as its factorization.

1012021200251 is an evil number, because the sum of its binary digits is even.

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

Adding to 1012021200251 its reverse (1520021202101), we get a palindrome (2532042402352).

The spelling of 1012021200251 in words is "one trillion, twelve billion, twenty-one million, two hundred thousand, two hundred fifty-one".