20211021021012 has 24 divisors (see below), whose sum is σ = 47159253218112. Its totient is φ = 6736977840000.

The previous prime is 20211021021011. The next prime is 20211021021013. The reversal of 20211021021012 is 21012012011202.

It is an interprime number because it is at equal distance from previous prime (20211021021011) and next prime (20211021021013).

It is a junction number, because it is equal to n+sod(n) for n = 20211021020982 and 20211021021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211021021011) 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, 660864 + ... + 6392087.

It is an arithmetic number, because the mean of its divisors is an integer number (1964968884088).

Almost surely, 2^{20211021021012} is an apocalyptic number.

It is an amenable number.

20211021021012 is an abundant number, since it is smaller than the sum of its proper divisors (26948232197100).

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

20211021021012 is a wasteful number, since it uses less digits than its factorization.

20211021021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291759 (or 7291757 counting only the distinct ones).

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

Adding to 20211021021012 its reverse (21012012011202), we get a palindrome (41223033032214).

The spelling of 20211021021012 in words is "twenty trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, twelve".