101621047 has 4 divisors (see below), whose sum is σ = 110859336. Its totient is φ = 92382760.

The previous prime is 101621041. The next prime is 101621081. The reversal of 101621047 is 740126101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101621047 - 2¹⁹ = 101096759 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 (101621041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619128 + ... + 4619149.

It is an arithmetic number, because the mean of its divisors is an integer number (27714834).

Almost surely, 2^101621047 is an apocalyptic number.

101621047 is a deficient number, since it is larger than the sum of its proper divisors (9238289).

101621047 is an equidigital number, since it uses as much as digits as its factorization.

101621047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9238288.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 101621047 is about 10080.7265115169. The cubic root of 101621047 is about 466.6535296188.

Adding to 101621047 its reverse (740126101), we get a palindrome (841747148).

The spelling of 101621047 in words is "one hundred one million, six hundred twenty-one thousand, forty-seven".