2121031230020 has 12 divisors (see below), whose sum is σ = 4454165583084. Its totient is φ = 848412492000.

The previous prime is 2121031230011. The next prime is 2121031230037. The reversal of 2121031230020 is 200321301212.

It can be written as a sum of positive squares in 2 ways, for example, as 970650566656 + 1150380663364 = 985216^2 + 1072558^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53025780731 + ... + 53025780770.

It is an arithmetic number, because the mean of its divisors is an integer number (371180465257).

Almost surely, 2^{2121031230020} is an apocalyptic number.

2121031230020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121031230020 is an abundant number, since it is smaller than the sum of its proper divisors (2333134353064).

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

2121031230020 is a wasteful number, since it uses less digits than its factorization.

2121031230020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106051561510 (or 106051561508 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2121031230020 its reverse (200321301212), we get a palindrome (2321352531232).

The spelling of 2121031230020 in words is "two trillion, one hundred twenty-one billion, thirty-one million, two hundred thirty thousand, twenty".