202121200020012 has 576 divisors, whose sum is σ = 614574099546624. Its totient is φ = 51201067438080.

The previous prime is 202121200020011. The next prime is 202121200020017. The reversal of 202121200020012 is 210020002121202.

It is a junction number, because it is equal to n+sod(n) for n = 202121200019973 and 202121200020000.

It is not an unprimeable number, because it can be changed into a prime (202121200020011) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 40399997503 + ... + 40400002505.

It is an arithmetic number, because the mean of its divisors is an integer number (1066968922824).

Almost surely, 2^{202121200020012} 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 202121200020012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307287049773312).

202121200020012 is an abundant number, since it is smaller than the sum of its proper divisors (412452899526612).

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

202121200020012 is a wasteful number, since it uses less digits than its factorization.

202121200020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878 (or 6869 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202121200020012 its reverse (210020002121202), we get a palindrome (412141202141214).

The spelling of 202121200020012 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred million, twenty thousand, twelve".