221012122212020 has 24 divisors (see below), whose sum is σ = 468631529044224. Its totient is φ = 87546549380256.

The previous prime is 221012122212001. The next prime is 221012122212103. The reversal of 221012122212020 is 20212221210122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221012122211983 and 221012122212001.

It is a congruent number.

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, 53643716924 + ... + 53643721043.

It is an arithmetic number, because the mean of its divisors is an integer number (19526313710176).

Almost surely, 2^{221012122212020} is an apocalyptic number.

221012122212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012122212020 is an abundant number, since it is smaller than the sum of its proper divisors (247619406832204).

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

221012122212020 is a wasteful number, since it uses less digits than its factorization.

221012122212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107287438079 (or 107287438077 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221012122212020 its reverse (20212221210122), we get a palindrome (241224343422142).

The spelling of 221012122212020 in words is "two hundred twenty-one trillion, twelve billion, one hundred twenty-two million, two hundred twelve thousand, twenty".