213012230123021 has 64 divisors (see below), whose sum is σ = 249165851590656. Its totient is φ = 178355864044800.

The previous prime is 213012230123003. The next prime is 213012230123039. The reversal of 213012230123021 is 120321032210312.

It is an interprime number because it is at equal distance from previous prime (213012230123003) and next prime (213012230123039).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213012230123021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213012230123321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29531707211 + ... + 29531714423.

It is an arithmetic number, because the mean of its divisors is an integer number (3893216431104).

Almost surely, 2^{213012230123021} is an apocalyptic number.

It is an amenable number.

213012230123021 is a deficient number, since it is larger than the sum of its proper divisors (36153621467635).

213012230123021 is a wasteful number, since it uses less digits than its factorization.

213012230123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9282.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 213012230123021 its reverse (120321032210312), we get a palindrome (333333262333333).

The spelling of 213012230123021 in words is "two hundred thirteen trillion, twelve billion, two hundred thirty million, one hundred twenty-three thousand, twenty-one".