213221563611 has 32 divisors (see below), whose sum is σ = 332773324800. Its totient is φ = 118906655616.

The previous prime is 213221563591. The next prime is 213221563627. The reversal of 213221563611 is 116365122312.

It is not a de Polignac number, because 213221563611 - 2⁵ = 213221563579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213221563651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34965 + ... + 653961.

It is an arithmetic number, because the mean of its divisors is an integer number (10399166400).

Almost surely, 2^213221563611 is an apocalyptic number.

213221563611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213221563611 is a deficient number, since it is larger than the sum of its proper divisors (119551761189).

213221563611 is a wasteful number, since it uses less digits than its factorization.

213221563611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619403.

The product of its digits is 12960, while the sum is 33.

Adding to 213221563611 its reverse (116365122312), we get a palindrome (329586685923).

The spelling of 213221563611 in words is "two hundred thirteen billion, two hundred twenty-one million, five hundred sixty-three thousand, six hundred eleven".