20202121020104 has 8 divisors (see below), whose sum is σ = 37878976912710. Its totient is φ = 10101060510048.

The previous prime is 20202121020097. The next prime is 20202121020121. The reversal of 20202121020104 is 40102012120202.

It can be written as a sum of positive squares in only one way, i.e., 18268358222500 + 1933762797604 = 4274150^2 + 1390598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1262632563749 + ... + 1262632563764.

Almost surely, 2^{20202121020104} is an apocalyptic number.

It is an amenable number.

20202121020104 is a deficient number, since it is larger than the sum of its proper divisors (17676855892606).

20202121020104 is a wasteful number, since it uses less digits than its factorization.

20202121020104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525265127519 (or 2525265127515 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20202121020104 its reverse (40102012120202), we get a palindrome (60304133140306).

The spelling of 20202121020104 in words is "twenty trillion, two hundred two billion, one hundred twenty-one million, twenty thousand, one hundred four".