101621001 has 16 divisors (see below), whose sum is σ = 140374080. Its totient is φ = 65345280.

The previous prime is 101620993. The next prime is 101621011. The reversal of 101621001 is 100126101.

It is a happy number.

It is not a de Polignac number, because 101621001 - 2³ = 101620993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101621011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6306 + ... + 15588.

It is an arithmetic number, because the mean of its divisors is an integer number (8773380).

Almost surely, 2^101621001 is an apocalyptic number.

It is an amenable number.

101621001 is a deficient number, since it is larger than the sum of its proper divisors (38753079).

101621001 is an equidigital number, since it uses as much as digits as its factorization.

101621001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 101621001 is about 10080.7242299351. The cubic root of 101621001 is about 466.6534592067.

Adding to 101621001 its reverse (100126101), we get a palindrome (201747102).

The spelling of 101621001 in words is "one hundred one million, six hundred twenty-one thousand, one".