21110022002120 has 32 divisors (see below), whose sum is σ = 47498691281400. Its totient is φ = 8443805818368.

The previous prime is 21110022002081. The next prime is 21110022002137. The reversal of 21110022002120 is 2120022001112.

It can be written as a sum of positive squares in 4 ways, for example, as 20827229906596 + 282792095524 = 4563686^2 + 531782^2 .

It is a super-3 number, since 3×21110022002120³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110022002095 and 21110022002104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4652855 + ... + 7991814.

Almost surely, 2^{21110022002120} is an apocalyptic number.

21110022002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110022002120 is an abundant number, since it is smaller than the sum of its proper divisors (26388669279280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110022002120 is a wasteful number, since it uses less digits than its factorization.

21110022002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12686417 (or 12686413 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21110022002120 its reverse (2120022001112), we get a palindrome (23230044003232).

The spelling of 21110022002120 in words is "twenty-one trillion, one hundred ten billion, twenty-two million, two thousand, one hundred twenty".