21020201211012 has 24 divisors (see below), whose sum is σ = 49047660729312. Its totient is φ = 7006658798400.

The previous prime is 21020201210977. The next prime is 21020201211049. The reversal of 21020201211012 is 21011210202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020201210982 and 21020201211000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8192689 + ... + 10447992.

It is an arithmetic number, because the mean of its divisors is an integer number (2043652530388).

Almost surely, 2^{21020201211012} is an apocalyptic number.

It is an amenable number.

21020201211012 is an abundant number, since it is smaller than the sum of its proper divisors (28027459518300).

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

21020201211012 is a wasteful number, since it uses less digits than its factorization.

21020201211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18734659 (or 18734657 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21020201211012 its reverse (21011210202012), we get a palindrome (42031411413024).

The spelling of 21020201211012 in words is "twenty-one trillion, twenty billion, two hundred one million, two hundred eleven thousand, twelve".