101920501 has 2 divisors, whose sum is σ = 101920502. Its totient is φ = 101920500.

The previous prime is 101920451. The next prime is 101920517. The reversal of 101920501 is 105029101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94770225 + 7150276 = 9735^2 + 2674^2 .

It is an emirp because it is prime and its reverse (105029101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101920501 - 2⁷ = 101920373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101923501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50960250 + 50960251.

It is an arithmetic number, because the mean of its divisors is an integer number (50960251).

Almost surely, 2^101920501 is an apocalyptic number.

It is an amenable number.

101920501 is a deficient number, since it is larger than the sum of its proper divisors (1).

101920501 is an equidigital number, since it uses as much as digits as its factorization.

101920501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 101920501 is about 10095.5683841971. The cubic root of 101920501 is about 467.1114538796. Note that the first 3 decimals are identical.

Adding to 101920501 its reverse (105029101), we get a palindrome (206949602).

The spelling of 101920501 in words is "one hundred one million, nine hundred twenty thousand, five hundred one".