213011022121 has 8 divisors (see below), whose sum is σ = 215661946824. Its totient is φ = 210370723200.

The previous prime is 213011022089. The next prime is 213011022127. The reversal of 213011022121 is 121220110312.

It can be written as a sum of positive squares in 4 ways, for example, as 74712568896 + 138298453225 = 273336^2 + 371885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213011022121 - 2⁵ = 213011022089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213011022095 and 213011022104.

It is not an unprimeable number, because it can be changed into a prime (213011022127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2616100 + ... + 2696293.

It is an arithmetic number, because the mean of its divisors is an integer number (26957743353).

Almost surely, 2^213011022121 is an apocalyptic number.

It is an amenable number.

213011022121 is a deficient number, since it is larger than the sum of its proper divisors (2650924703).

213011022121 is a wasteful number, since it uses less digits than its factorization.

213011022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312891.

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

Adding to 213011022121 its reverse (121220110312), we get a palindrome (334231132433).

The spelling of 213011022121 in words is "two hundred thirteen billion, eleven million, twenty-two thousand, one hundred twenty-one".