21102011120213 has 4 divisors (see below), whose sum is σ = 21306885014688. Its totient is φ = 20897137225740.

The previous prime is 21102011120207. The next prime is 21102011120219. The reversal of 21102011120213 is 31202111020112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21102011120207) and next prime (21102011120219).

It is a cyclic number.

It is not a de Polignac number, because 21102011120213 - 2¹⁴ = 21102011103829 is a prime.

It is a super-2 number, since 2×21102011120213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102011120191 and 21102011120200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102011120219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102436947083 + ... + 102436947288.

It is an arithmetic number, because the mean of its divisors is an integer number (5326721253672).

Almost surely, 2^{21102011120213} is an apocalyptic number.

It is an amenable number.

21102011120213 is a deficient number, since it is larger than the sum of its proper divisors (204873894475).

21102011120213 is a wasteful number, since it uses less digits than its factorization.

21102011120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204873894474.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21102011120213 its reverse (31202111020112), we get a palindrome (52304122140325).

The spelling of 21102011120213 in words is "twenty-one trillion, one hundred two billion, eleven million, one hundred twenty thousand, two hundred thirteen".