202120221020 has 12 divisors (see below), whose sum is σ = 424452464184. Its totient is φ = 80848088400.

The previous prime is 202120220993. The next prime is 202120221053. The reversal of 202120221020 is 20122021202.

It is a junction number, because it is equal to n+sod(n) for n = 202120220986 and 202120221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053005506 + ... + 5053005545.

It is an arithmetic number, because the mean of its divisors is an integer number (35371038682).

Almost surely, 2^202120221020 is an apocalyptic number.

202120221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120221020 is an abundant number, since it is smaller than the sum of its proper divisors (222332243164).

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

202120221020 is a wasteful number, since it uses less digits than its factorization.

202120221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106011060 (or 10106011058 counting only the distinct ones).

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

Adding to 202120221020 its reverse (20122021202), we get a palindrome (222242242222).

The spelling of 202120221020 in words is "two hundred two billion, one hundred twenty million, two hundred twenty-one thousand, twenty".