20001210202220 has 24 divisors (see below), whose sum is σ = 45233506150224. Its totient is φ = 7385062228416.

The previous prime is 20001210202177. The next prime is 20001210202231. The reversal of 20001210202220 is 2220201210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001210202195 and 20001210202204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38463865514 + ... + 38463866033.

It is an arithmetic number, because the mean of its divisors is an integer number (1884729422926).

Almost surely, 2^{20001210202220} is an apocalyptic number.

20001210202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001210202220 is an abundant number, since it is smaller than the sum of its proper divisors (25232295948004).

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

20001210202220 is a wasteful number, since it uses less digits than its factorization.

20001210202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76927731569 (or 76927731567 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20001210202220 its reverse (2220201210002), we get a palindrome (22221411412222).

The spelling of 20001210202220 in words is "twenty trillion, one billion, two hundred ten million, two hundred two thousand, two hundred twenty".