2221202120020 has 48 divisors (see below), whose sum is σ = 5024344243968. Its totient is φ = 819971233920.

The previous prime is 2221202119993. The next prime is 2221202120023. The reversal of 2221202120020 is 200212021222.

It is a junction number, because it is equal to n+sod(n) for n = 2221202119976 and 2221202120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221202120023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440085 + ... + 2153155.

It is an arithmetic number, because the mean of its divisors is an integer number (104673838416).

Almost surely, 2^{2221202120020} is an apocalyptic number.

2221202120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221202120020 is an abundant number, since it is smaller than the sum of its proper divisors (2803142123948).

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

2221202120020 is a wasteful number, since it uses less digits than its factorization.

2221202120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718080 (or 1718078 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2221202120020 its reverse (200212021222), we get a palindrome (2421414141242).

The spelling of 2221202120020 in words is "two trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty thousand, twenty".