20021212120010 has 16 divisors (see below), whose sum is σ = 36060524177256. Its totient is φ = 8003519878848.

The previous prime is 20021212120001. The next prime is 20021212120037. The reversal of 20021212120010 is 1002121212002.

It can be written as a sum of positive squares in 4 ways, for example, as 18530588450089 + 1490623669921 = 4304717^2 + 1220911^2 .

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, 620604209 + ... + 620636468.

Almost surely, 2^{20021212120010} is an apocalyptic number.

20021212120010 is a deficient number, since it is larger than the sum of its proper divisors (16039312057246).

20021212120010 is a wasteful number, since it uses less digits than its factorization.

20021212120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241242297.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021212120010 its reverse (1002121212002), we get a palindrome (21023333332012).

The spelling of 20021212120010 in words is "twenty trillion, twenty-one billion, two hundred twelve million, one hundred twenty thousand, ten".