213021030303121 has 16 divisors (see below), whose sum is σ = 215664805843200. Its totient is φ = 210379106564608.

The previous prime is 213021030303113. The next prime is 213021030303139. The reversal of 213021030303121 is 121303030120312.

It is a cyclic number.

It is not a de Polignac number, because 213021030303121 - 2³ = 213021030303113 is a prime.

It is a super-2 number, since 2×213021030303121² (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 = 213021030303092 and 213021030303101.

It is not an unprimeable number, because it can be changed into a prime (213021030303101) 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, 3499633275 + ... + 3499694143.

It is an arithmetic number, because the mean of its divisors is an integer number (13479050365200).

Almost surely, 2^{213021030303121} is an apocalyptic number.

It is an amenable number.

213021030303121 is a deficient number, since it is larger than the sum of its proper divisors (2643775540079).

213021030303121 is a wasteful number, since it uses less digits than its factorization.

213021030303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75368.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213021030303121 its reverse (121303030120312), we get a palindrome (334324060423433).

The spelling of 213021030303121 in words is "two hundred thirteen trillion, twenty-one billion, thirty million, three hundred three thousand, one hundred twenty-one".