213000120001021 has 16 divisors (see below), whose sum is σ = 216130356449280. Its totient is φ = 209890709748720.

The previous prime is 213000120000991. The next prime is 213000120001121. The reversal of 213000120001021 is 120100021000312.

It is a cyclic number.

It is not a de Polignac number, because 213000120001021 - 2⁹ = 213000120000509 is a prime.

It is a super-2 number, since 2×213000120001021² (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 = 213000120000992 and 213000120001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213000120001121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108540096 + ... + 110485078.

It is an arithmetic number, because the mean of its divisors is an integer number (13508147278080).

Almost surely, 2^{213000120001021} is an apocalyptic number.

It is an amenable number.

213000120001021 is a deficient number, since it is larger than the sum of its proper divisors (3130236448259).

213000120001021 is a wasteful number, since it uses less digits than its factorization.

213000120001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950336.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 213000120001021 its reverse (120100021000312), we get a palindrome (333100141001333).

The spelling of 213000120001021 in words is "two hundred thirteen trillion, one hundred twenty million, one thousand, twenty-one".