101621147 has 2 divisors, whose sum is σ = 101621148. Its totient is φ = 101621146.

The previous prime is 101621137. The next prime is 101621159. The reversal of 101621147 is 741126101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101621147 - 2¹⁶ = 101555611 is a prime.

It is not a weakly prime, because it can be changed into another prime (101621137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50810573 + 50810574.

It is an arithmetic number, because the mean of its divisors is an integer number (50810574).

Almost surely, 2^101621147 is an apocalyptic number.

101621147 is a deficient number, since it is larger than the sum of its proper divisors (1).

101621147 is an equidigital number, since it uses as much as digits as its factorization.

101621147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 101621147 is about 10080.7314714757. The cubic root of 101621147 is about 466.6536826886.

Adding to 101621147 its reverse (741126101), we get a palindrome (842747248).

The spelling of 101621147 in words is "one hundred one million, six hundred twenty-one thousand, one hundred forty-seven".