20200121222212 has 24 divisors (see below), whose sum is σ = 37430540494200. Its totient is φ = 9505709783040.

The previous prime is 20200121222153. The next prime is 20200121222243. The reversal of 20200121222212 is 21222212100202.

It can be written as a sum of positive squares in 4 ways, for example, as 18245678078016 + 1954443144196 = 4271496^2 + 1398014^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20200121222212.

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 7 ways as a sum of consecutive naturals, for example, 735337 + ... + 6398512.

It is an arithmetic number, because the mean of its divisors is an integer number (1559605853925).

Almost surely, 2^{20200121222212} is an apocalyptic number.

It is an amenable number.

20200121222212 is a deficient number, since it is larger than the sum of its proper divisors (17230419271988).

20200121222212 is a wasteful number, since it uses less digits than its factorization.

20200121222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175511 (or 7175509 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20200121222212 its reverse (21222212100202), we get a palindrome (41422333322414).

The spelling of 20200121222212 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".