30021212020 has 12 divisors (see below), whose sum is σ = 63044545284. Its totient is φ = 12008484800.

The previous prime is 30021212017. The next prime is 30021212041. The reversal of 30021212020 is 2021212003.

It can be written as a sum of positive squares in 2 ways, for example, as 18027895824 + 11993316196 = 134268^2 + 109514^2 .

It is a super-2 number, since 2×30021212020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750530281 + ... + 750530320.

It is an arithmetic number, because the mean of its divisors is an integer number (5253712107).

Almost surely, 2^30021212020 is an apocalyptic number.

It is an amenable number.

30021212020 is an abundant number, since it is smaller than the sum of its proper divisors (33023333264).

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

30021212020 is a wasteful number, since it uses less digits than its factorization.

30021212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501060610 (or 1501060608 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 30021212020 its reverse (2021212003), we get a palindrome (32042424023).

The spelling of 30021212020 in words is "thirty billion, twenty-one million, two hundred twelve thousand, twenty".