20210221211012 has 96 divisors (see below), whose sum is σ = 42776194535424. Its totient is φ = 8167427452800.

The previous prime is 20210221210987. The next prime is 20210221211027. The reversal of 20210221211012 is 21011212201202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693755687 + ... + 693784817.

It is an arithmetic number, because the mean of its divisors is an integer number (445585359744).

Almost surely, 2^{20210221211012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210221211012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21388097267712).

20210221211012 is an abundant number, since it is smaller than the sum of its proper divisors (22565973324412).

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

20210221211012 is a wasteful number, since it uses less digits than its factorization.

20210221211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44409 (or 44407 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20210221211012 its reverse (21011212201202), we get a palindrome (41221433412214).

The spelling of 20210221211012 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, two hundred eleven thousand, twelve".