213101020031 has 4 divisors (see below), whose sum is σ = 213237014592. Its totient is φ = 212965025472.

The previous prime is 213101020001. The next prime is 213101020081. The reversal of 213101020031 is 130020101312.

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

It is a cyclic number.

It is not a de Polignac number, because 213101020031 - 2¹⁸ = 213100757887 is a prime.

It is a super-2 number, since 2×213101020031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213101019988 and 213101020015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213101020001) 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, 67994930 + ... + 67998063.

It is an arithmetic number, because the mean of its divisors is an integer number (53309253648).

Almost surely, 2^213101020031 is an apocalyptic number.

213101020031 is a deficient number, since it is larger than the sum of its proper divisors (135994561).

213101020031 is a wasteful number, since it uses less digits than its factorization.

213101020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135994560.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 213101020031 its reverse (130020101312), we get a palindrome (343121121343).

The spelling of 213101020031 in words is "two hundred thirteen billion, one hundred one million, twenty thousand, thirty-one".