20021021121212 has 48 divisors (see below), whose sum is σ = 36943655495040. Its totient is φ = 9467497899072.

The previous prime is 20021021121203. The next prime is 20021021121251. The reversal of 20021021121212 is 21212112012002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123546023 + ... + 123707969.

It is an arithmetic number, because the mean of its divisors is an integer number (769659489480).

Almost surely, 2^{20021021121212} is an apocalyptic number.

It is an amenable number.

20021021121212 is a deficient number, since it is larger than the sum of its proper divisors (16922634373828).

20021021121212 is a wasteful number, since it uses less digits than its factorization.

20021021121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164730 (or 164728 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021021121212 its reverse (21212112012002), we get a palindrome (41233133133214).

The spelling of 20021021121212 in words is "twenty trillion, twenty-one billion, twenty-one million, one hundred twenty-one thousand, two hundred twelve".