213113121022031 has 4 divisors (see below), whose sum is σ = 217647442745952. Its totient is φ = 208578799298112.

The previous prime is 213113121022027. The next prime is 213113121022057. The reversal of 213113121022031 is 130220121311312.

It is a happy number.

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 213113121022031 - 2² = 213113121022027 is a prime.

It is a super-2 number, since 2×213113121022031² (a number of 29 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 = 213113121021988 and 213113121022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213113121222031) 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, 2267160861890 + ... + 2267160861983.

It is an arithmetic number, because the mean of its divisors is an integer number (54411860686488).

Almost surely, 2^{213113121022031} is an apocalyptic number.

213113121022031 is a deficient number, since it is larger than the sum of its proper divisors (4534321723921).

213113121022031 is an equidigital number, since it uses as much as digits as its factorization.

213113121022031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534321723920.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 213113121022031 its reverse (130220121311312), we get a palindrome (343333242333343).

The spelling of 213113121022031 in words is "two hundred thirteen trillion, one hundred thirteen billion, one hundred twenty-one million, twenty-two thousand, thirty-one".