101621149 has 6 divisors (see below), whose sum is σ = 118212414. Its totient is φ = 87103800.

The previous prime is 101621147. The next prime is 101621159. The reversal of 101621149 is 941126101.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 27489049 = 8610^2 + 5243^2 .

It is not a de Polignac number, because 101621149 - 2¹ = 101621147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101621147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1036902 + ... + 1036999.

It is an arithmetic number, because the mean of its divisors is an integer number (19702069).

Almost surely, 2^101621149 is an apocalyptic number.

It is an amenable number.

101621149 is a deficient number, since it is larger than the sum of its proper divisors (16591265).

101621149 is an equidigital number, since it uses as much as digits as its factorization.

101621149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073915 (or 2073908 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 101621149 is about 10080.7315706748. The cubic root of 101621149 is about 466.6536857500.

It can be divided in two parts, 10162 and 1149, that added together give a palindrome (11311).

The spelling of 101621149 in words is "one hundred one million, six hundred twenty-one thousand, one hundred forty-nine".