101201001001 has 4 divisors (see below), whose sum is σ = 101880202500. Its totient is φ = 100521799504.

The previous prime is 101201000963. The next prime is 101201001007. The reversal of 101201001001 is 100100102101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62322626025 + 38878374976 = 249645^2 + 197176^2 .

It is a cyclic number.

It is not a de Polignac number, because 101201001001 - 2⁹ = 101201000489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101201001007) 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, 339600526 + ... + 339600823.

It is an arithmetic number, because the mean of its divisors is an integer number (25470050625).

Almost surely, 2^101201001001 is an apocalyptic number.

It is an amenable number.

101201001001 is a deficient number, since it is larger than the sum of its proper divisors (679201499).

101201001001 is an equidigital number, since it uses as much as digits as its factorization.

101201001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679201498.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 101201001001 its reverse (100100102101), we get a palindrome (201301103102).

The spelling of 101201001001 in words is "one hundred one billion, two hundred one million, one thousand, one".