213221100131111 has 16 divisors (see below), whose sum is σ = 222662461731840. Its totient is φ = 203919474067680.

The previous prime is 213221100131021. The next prime is 213221100131129. The reversal of 213221100131111 is 111131001122312.

It is a cyclic number.

It is not a de Polignac number, because 213221100131111 - 2³⁸ = 212946222224167 is a prime.

It is a super-2 number, since 2×213221100131111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221100136111) 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, 20932550 + ... + 29404316.

It is an arithmetic number, because the mean of its divisors is an integer number (13916403858240).

Almost surely, 2^{213221100131111} is an apocalyptic number.

213221100131111 is a deficient number, since it is larger than the sum of its proper divisors (9441361600729).

213221100131111 is a wasteful number, since it uses less digits than its factorization.

213221100131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8480014.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 213221100131111 its reverse (111131001122312), we get a palindrome (324352101253423).

The spelling of 213221100131111 in words is "two hundred thirteen trillion, two hundred twenty-one billion, one hundred million, one hundred thirty-one thousand, one hundred eleven".