101221983487 has 2 divisors, whose sum is σ = 101221983488. Its totient is φ = 101221983486.

The previous prime is 101221983461. The next prime is 101221983497. The reversal of 101221983487 is 784389122101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101221983487 - 2¹¹ = 101221981439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221983437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610991743 + 50610991744.

It is an arithmetic number, because the mean of its divisors is an integer number (50610991744).

Almost surely, 2^101221983487 is an apocalyptic number.

101221983487 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221983487 is an equidigital number, since it uses as much as digits as its factorization.

101221983487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 101221983487 in words is "one hundred one billion, two hundred twenty-one million, nine hundred eighty-three thousand, four hundred eighty-seven".