21101230012031 has 8 divisors (see below), whose sum is σ = 22728184622304. Its totient is φ = 19474815840480.

The previous prime is 21101230012001. The next prime is 21101230012039. The reversal of 21101230012031 is 13021003210112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21101230012031 - 2³⁸ = 20826352105087 is a prime.

It is a super-2 number, since 2×21101230012031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101230012039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135028580 + ... + 135184761.

It is an arithmetic number, because the mean of its divisors is an integer number (2841023077788).

Almost surely, 2^{21101230012031} is an apocalyptic number.

21101230012031 is a deficient number, since it is larger than the sum of its proper divisors (1626954610273).

21101230012031 is a wasteful number, since it uses less digits than its factorization.

21101230012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270219361.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21101230012031 its reverse (13021003210112), we get a palindrome (34122233222143).

The spelling of 21101230012031 in words is "twenty-one trillion, one hundred one billion, two hundred thirty million, twelve thousand, thirty-one".