101220078556787 has 2 divisors, whose sum is σ = 101220078556788. Its totient is φ = 101220078556786.

The previous prime is 101220078556757. The next prime is 101220078556939. The reversal of 101220078556787 is 787655870022101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101220078556787 - 2³⁴ = 101202898687603 is a prime.

It is not a weakly prime, because it can be changed into another prime (101220078556717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610039278393 + 50610039278394.

It is an arithmetic number, because the mean of its divisors is an integer number (50610039278394).

Almost surely, 2^{101220078556787} is an apocalyptic number.

101220078556787 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220078556787 is an equidigital number, since it uses as much as digits as its factorization.

101220078556787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13171200, while the sum is 59.

The spelling of 101220078556787 in words is "one hundred one trillion, two hundred twenty billion, seventy-eight million, five hundred fifty-six thousand, seven hundred eighty-seven".