213001311021 has 8 divisors (see below), whose sum is σ = 284344334880. Its totient is φ = 141829580592.

The previous prime is 213001310999. The next prime is 213001311043. The reversal of 213001311021 is 120113100312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213001310999) and next prime (213001311043).

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

It is not a de Polignac number, because 213001311021 - 2¹⁵ = 213001278253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213001311091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42820455 + ... + 42825428.

It is an arithmetic number, because the mean of its divisors is an integer number (35543041860).

Almost surely, 2^213001311021 is an apocalyptic number.

It is an amenable number.

213001311021 is a deficient number, since it is larger than the sum of its proper divisors (71343023859).

213001311021 is an equidigital number, since it uses as much as digits as its factorization.

213001311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85646715.

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

Adding to 213001311021 its reverse (120113100312), we get a palindrome (333114411333).

The spelling of 213001311021 in words is "two hundred thirteen billion, one million, three hundred eleven thousand, twenty-one".