202021202120 has 32 divisors (see below), whose sum is σ = 454973009400. Its totient is φ = 80732871168.

The previous prime is 202021202087. The next prime is 202021202143. The reversal of 202021202120 is 21202120202.

It can be written as a sum of positive squares in 4 ways, for example, as 112065596644 + 89955605476 = 334762^2 + 299926^2 .

It is a super-2 number, since 2×202021202120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202021202095 and 202021202104.

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, 2319509 + ... + 2405028.

Almost surely, 2^202021202120 is an apocalyptic number.

202021202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021202120 is an abundant number, since it is smaller than the sum of its proper divisors (252951807280).

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

202021202120 is a wasteful number, since it uses less digits than its factorization.

202021202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725617 (or 4725613 counting only the distinct ones).

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

Adding to 202021202120 its reverse (21202120202), we get a palindrome (223223322322).

The spelling of 202021202120 in words is "two hundred two billion, twenty-one million, two hundred two thousand, one hundred twenty".