101221111850087 has 2 divisors, whose sum is σ = 101221111850088. Its totient is φ = 101221111850086.

The previous prime is 101221111850081. The next prime is 101221111850219. The reversal of 101221111850087 is 780058111122101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101221111850087 - 2²⁰ = 101221110801511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221111850087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221111850081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610555925043 + 50610555925044.

It is an arithmetic number, because the mean of its divisors is an integer number (50610555925044).

Almost surely, 2^{101221111850087} is an apocalyptic number.

101221111850087 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221111850087 is an equidigital number, since it uses as much as digits as its factorization.

101221111850087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 38.

Adding to 101221111850087 its reverse (780058111122101), we get a palindrome (881279222972188).

The spelling of 101221111850087 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred eleven million, eight hundred fifty thousand, eighty-seven".