21003012212112 has 90 divisors (see below), whose sum is σ = 68375877790038. Its totient is φ = 6000860630016.

The previous prime is 21003012212053. The next prime is 21003012212141. The reversal of 21003012212112 is 21121221030012.

21003012212112 is a `hidden beast` number, since 210 + 0 + 301 + 22 + 121 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17387598984336 + 3615413227776 = 4169844^2 + 1901424^2 .

It is a super-2 number, since 2×21003012212112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1488301633 + ... + 1488315744.

Almost surely, 2^{21003012212112} is an apocalyptic number.

It is an amenable number.

21003012212112 is an abundant number, since it is smaller than the sum of its proper divisors (47372865577926).

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

21003012212112 is a wasteful number, since it uses less digits than its factorization.

21003012212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976617405 (or 2976617389 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21003012212112 its reverse (21121221030012), we get a palindrome (42124233242124).

The spelling of 21003012212112 in words is "twenty-one trillion, three billion, twelve million, two hundred twelve thousand, one hundred twelve".