21120000220212 has 24 divisors (see below), whose sum is σ = 49285334683200. Its totient is φ = 7039238049216.

The previous prime is 21120000220147. The next prime is 21120000220223. The reversal of 21120000220212 is 21202200002112.

It is a junction number, because it is equal to n+sod(n) for n = 21120000220191 and 21120000220200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95137537 + ... + 95359272.

It is an arithmetic number, because the mean of its divisors is an integer number (2053555611800).

Almost surely, 2^{21120000220212} is an apocalyptic number.

It is an amenable number.

21120000220212 is an abundant number, since it is smaller than the sum of its proper divisors (28165334462988).

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

21120000220212 is a wasteful number, since it uses less digits than its factorization.

21120000220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190506055 (or 190506053 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21120000220212 its reverse (21202200002112), we get a palindrome (42322200222324).

The spelling of 21120000220212 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty thousand, two hundred twelve".