21120102213 has 16 divisors (see below), whose sum is σ = 33876856320. Its totient is φ = 11433438576.

The previous prime is 21120102209. The next prime is 21120102217. The reversal of 21120102213 is 31220102112.

It is an interprime number because it is at equal distance from previous prime (21120102209) and next prime (21120102217).

It is not a de Polignac number, because 21120102213 - 2² = 21120102209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21120102192 and 21120102201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120102217) 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, 26465895 + ... + 26466692.

It is an arithmetic number, because the mean of its divisors is an integer number (2117303520).

Almost surely, 2^21120102213 is an apocalyptic number.

It is an amenable number.

21120102213 is a deficient number, since it is larger than the sum of its proper divisors (12756754107).

21120102213 is a wasteful number, since it uses less digits than its factorization.

21120102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52932616.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21120102213 its reverse (31220102112), we get a palindrome (52340204325).

The spelling of 21120102213 in words is "twenty-one billion, one hundred twenty million, one hundred two thousand, two hundred thirteen".