21120212021012 has 48 divisors (see below), whose sum is σ = 39948285162240. Its totient is φ = 9712341760128.

The previous prime is 21120212020997. The next prime is 21120212021021. The reversal of 21120212021012 is 21012021202112.

It is a super-3 number, since 3×21120212021012³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68759189 + ... + 69065667.

It is an arithmetic number, because the mean of its divisors is an integer number (832255940880).

Almost surely, 2^{21120212021012} is an apocalyptic number.

It is an amenable number.

21120212021012 is a deficient number, since it is larger than the sum of its proper divisors (18828073141228).

21120212021012 is a wasteful number, since it uses less digits than its factorization.

21120212021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311312 (or 311310 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21120212021012 its reverse (21012021202112), we get a palindrome (42132233223124).

The spelling of 21120212021012 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, twenty-one thousand, twelve".