101021001 has 16 divisors (see below), whose sum is σ = 139511808. Its totient is φ = 64979600.

The previous prime is 101020981. The next prime is 101021003. The reversal of 101021001 is 100120101.

It is a cyclic number.

It is not a de Polignac number, because 101021001 - 2⁶ = 101020937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101021003) 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, 4966 + ... + 15056.

It is an arithmetic number, because the mean of its divisors is an integer number (8719488).

Almost surely, 2^101021001 is an apocalyptic number.

It is an amenable number.

101021001 is a deficient number, since it is larger than the sum of its proper divisors (38490807).

101021001 is a wasteful number, since it uses less digits than its factorization.

101021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10212.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 101021001 is about 10050.9204056146. The cubic root of 101021001 is about 465.7332263839.

Adding to 101021001 its reverse (100120101), we get a palindrome (201141102).

The spelling of 101021001 in words is "one hundred one million, twenty-one thousand, one".