21010212202031 has 8 divisors (see below), whose sum is σ = 22626957240384. Its totient is φ = 19393549287840.

The previous prime is 21010212202019. The next prime is 21010212202039. The reversal of 21010212202031 is 13020221201012.

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

It is not a de Polignac number, because 21010212202031 - 2¹⁸ = 21010211939887 is a prime.

It is a super-2 number, since 2×21010212202031² (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 (21010212202039) 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, 19999175 + ... + 21023496.

It is an arithmetic number, because the mean of its divisors is an integer number (2828369655048).

Almost surely, 2^{21010212202031} is an apocalyptic number.

21010212202031 is a deficient number, since it is larger than the sum of its proper divisors (1616745038353).

21010212202031 is a wasteful number, since it uses less digits than its factorization.

21010212202031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41062081.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21010212202031 its reverse (13020221201012), we get a palindrome (34030433403043).

The spelling of 21010212202031 in words is "twenty-one trillion, ten billion, two hundred twelve million, two hundred two thousand, thirty-one".