20210001212220 has 48 divisors (see below), whose sum is σ = 56615092306080. Its totient is φ = 5386753760256.

The previous prime is 20210001212197. The next prime is 20210001212231. The reversal of 20210001212220 is 2221210001202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20210001212220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80495377 + ... + 80746056.

It is an arithmetic number, because the mean of its divisors is an integer number (1179481089710).

Almost surely, 2^{20210001212220} is an apocalyptic number.

20210001212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210001212220 is an abundant number, since it is smaller than the sum of its proper divisors (36405091093860).

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

20210001212220 is a wasteful number, since it uses less digits than its factorization.

20210001212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161243534 (or 161243532 counting only the distinct ones).

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

Adding to 20210001212220 its reverse (2221210001202), we get a palindrome (22431211213422).

The spelling of 20210001212220 in words is "twenty trillion, two hundred ten billion, one million, two hundred twelve thousand, two hundred twenty".