20012011012021 has 8 divisors (see below), whose sum is σ = 22874064487040. Its totient is φ = 17150756226768.

The previous prime is 20012011012009. The next prime is 20012011012039. The reversal of 20012011012021 is 12021011021002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012011012021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012011011992 and 20012011012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012011012921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199618746 + ... + 199718971.

It is an arithmetic number, because the mean of its divisors is an integer number (2859258060880).

Almost surely, 2^{20012011012021} is an apocalyptic number.

It is an amenable number.

20012011012021 is a deficient number, since it is larger than the sum of its proper divisors (2862053475019).

20012011012021 is an equidigital number, since it uses as much as digits as its factorization.

20012011012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399344883.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20012011012021 its reverse (12021011021002), we get a palindrome (32033022033023).

The spelling of 20012011012021 in words is "twenty trillion, twelve billion, eleven million, twelve thousand, twenty-one".