21012002220112 has 20 divisors (see below), whose sum is σ = 40710889835296. Its totient is φ = 10505966133600.

The previous prime is 21012002220109. The next prime is 21012002220151. The reversal of 21012002220112 is 21102220021012.

It is a happy number.

It is a super-3 number, since 3×21012002220112³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3167413 + ... + 7215019.

Almost surely, 2^{21012002220112} is an apocalyptic number.

It is an amenable number.

21012002220112 is a deficient number, since it is larger than the sum of its proper divisors (19698887615184).

21012002220112 is a wasteful number, since it uses less digits than its factorization.

21012002220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372066 (or 4372060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012002220112 its reverse (21102220021012), we get a palindrome (42114222241124).

The spelling of 21012002220112 in words is "twenty-one trillion, twelve billion, two million, two hundred twenty thousand, one hundred twelve".