20120212012021 has 24 divisors (see below), whose sum is σ = 22346928634464. Its totient is φ = 18099981900000.

The previous prime is 20120212012013. The next prime is 20120212012067. The reversal of 20120212012021 is 12021021202102.

It is a happy number.

It is not a de Polignac number, because 20120212012021 - 2³ = 20120212012013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120212011986 and 20120212012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120212012081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21677686 + ... + 22586776.

It is an arithmetic number, because the mean of its divisors is an integer number (931122026436).

Almost surely, 2^{20120212012021} is an apocalyptic number.

It is an amenable number.

20120212012021 is a deficient number, since it is larger than the sum of its proper divisors (2226716622443).

20120212012021 is a wasteful number, since it uses less digits than its factorization.

20120212012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911025 (or 911014 counting only the distinct ones).

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

Adding to 20120212012021 its reverse (12021021202102), we get a palindrome (32141233214123).

The spelling of 20120212012021 in words is "twenty trillion, one hundred twenty billion, two hundred twelve million, twelve thousand, twenty-one".