213000002112121 has 16 divisors (see below), whose sum is σ = 243821616661504. Its totient is φ = 182276681955984.

The previous prime is 213000002112089. The next prime is 213000002112169. The reversal of 213000002112121 is 121211200000312.

It is not a de Polignac number, because 213000002112121 - 2⁵ = 213000002112089 is a prime.

It is a super-2 number, since 2×213000002112121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213000002112095 and 213000002112104.

It is not an unprimeable number, because it can be changed into a prime (213000002110121) 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, 74955580 + ... + 77745346.

It is an arithmetic number, because the mean of its divisors is an integer number (15238851041344).

Almost surely, 2^{213000002112121} is an apocalyptic number.

It is an amenable number.

213000002112121 is a deficient number, since it is larger than the sum of its proper divisors (30821614549383).

213000002112121 is a wasteful number, since it uses less digits than its factorization.

213000002112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807380.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 213000002112121 its reverse (121211200000312), we get a palindrome (334211202112433).

The spelling of 213000002112121 in words is "two hundred thirteen trillion, two million, one hundred twelve thousand, one hundred twenty-one".