10212578397551 has 2 divisors, whose sum is σ = 10212578397552. Its totient is φ = 10212578397550.

The previous prime is 10212578397503. The next prime is 10212578397559. The reversal of 10212578397551 is 15579387521201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10212578397551 - 2⁶ = 10212578397487 is a prime.

It is a super-2 number, since 2×10212578397551² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10212578397559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106289198775 + 5106289198776.

It is an arithmetic number, because the mean of its divisors is an integer number (5106289198776).

Almost surely, 2^{10212578397551} is an apocalyptic number.

10212578397551 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212578397551 is an equidigital number, since it uses as much as digits as its factorization.

10212578397551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292000, while the sum is 56.

The spelling of 10212578397551 in words is "ten trillion, two hundred twelve billion, five hundred seventy-eight million, three hundred ninety-seven thousand, five hundred fifty-one".