20002012012021 has 32 divisors (see below), whose sum is σ = 22488366700800. Its totient is φ = 17669392925184.

The previous prime is 20002012011889. The next prime is 20002012012049. The reversal of 20002012012021 is 12021021020002.

It is a happy number.

It is not a de Polignac number, because 20002012012021 - 2³¹ = 19999864528373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20002012011992 and 20002012012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002012012421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21074505 + ... + 22003153.

It is an arithmetic number, because the mean of its divisors is an integer number (702761459400).

Almost surely, 2^{20002012012021} is an apocalyptic number.

It is an amenable number.

20002012012021 is a deficient number, since it is larger than the sum of its proper divisors (2486354688779).

20002012012021 is a wasteful number, since it uses less digits than its factorization.

20002012012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929485.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20002012012021 its reverse (12021021020002), we get a palindrome (32023033032023).

The spelling of 20002012012021 in words is "twenty trillion, two billion, twelve million, twelve thousand, twenty-one".