21101030231001 has 16 divisors (see below), whose sum is σ = 32155182720000. Its totient is φ = 12057269601168.

The previous prime is 21101030230991. The next prime is 21101030231009. The reversal of 21101030231001 is 10013203010112.

It is a happy number.

It is not a de Polignac number, because 21101030231001 - 2⁶ = 21101030230937 is a prime.

It is a super-4 number, since 4×21101030231001⁴ (a number of 54 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101030231009) 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, 18686751 + ... + 19783748.

It is an arithmetic number, because the mean of its divisors is an integer number (2009698920000).

Almost surely, 2^{21101030231001} is an apocalyptic number.

21101030231001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21101030231001 is a deficient number, since it is larger than the sum of its proper divisors (11054152488999).

21101030231001 is a wasteful number, since it uses less digits than its factorization.

21101030231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38496628.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21101030231001 its reverse (10013203010112), we get a palindrome (31114233241113).

The spelling of 21101030231001 in words is "twenty-one trillion, one hundred one billion, thirty million, two hundred thirty-one thousand, one".