213001023212021 has 4 divisors (see below), whose sum is σ = 232364752594944. Its totient is φ = 193637293829100.

The previous prime is 213001023212017. The next prime is 213001023212053. The reversal of 213001023212021 is 120212320100312.

213001023212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213001023212021 - 2² = 213001023212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213001023211984 and 213001023212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213001023812021) 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, 9681864691445 + ... + 9681864691466.

It is an arithmetic number, because the mean of its divisors is an integer number (58091188148736).

Almost surely, 2^{213001023212021} is an apocalyptic number.

It is an amenable number.

213001023212021 is a deficient number, since it is larger than the sum of its proper divisors (19363729382923).

213001023212021 is a wasteful number, since it uses less digits than its factorization.

213001023212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19363729382922.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 213001023212021 its reverse (120212320100312), we get a palindrome (333213343312333).

The spelling of 213001023212021 in words is "two hundred thirteen trillion, one billion, twenty-three million, two hundred twelve thousand, twenty-one".