20402212042212 has 384 divisors, whose sum is σ = 66247321620480. Its totient is φ = 4715757066240.

The previous prime is 20402212042211. The next prime is 20402212042241. The reversal of 20402212042212 is 21224021220402.

It is not an unprimeable number, because it can be changed into a prime (20402212042211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 48233823 + ... + 48654969.

It is an arithmetic number, because the mean of its divisors is an integer number (172519066720).

Almost surely, 2^{20402212042212} is an apocalyptic number.

20402212042212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20402212042212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33123660810240).

20402212042212 is an abundant number, since it is smaller than the sum of its proper divisors (45845109578268).

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

20402212042212 is a wasteful number, since it uses less digits than its factorization.

20402212042212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421331 (or 421329 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 20402212042212 its reverse (21224021220402), we get a palindrome (41626233262614).

The spelling of 20402212042212 in words is "twenty trillion, four hundred two billion, two hundred twelve million, forty-two thousand, two hundred twelve".