20100121000010 has 32 divisors (see below), whose sum is σ = 37798383963600. Its totient is φ = 7685945881600.

The previous prime is 20100120999989. The next prime is 20100121000033. The reversal of 20100121000010 is 1000012100102.

It can be written as a sum of positive squares in 8 ways, for example, as 15110611494169 + 4989509505841 = 3887237^2 + 2233721^2 .

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, 343093295 + ... + 343151874.

Almost surely, 2^{20100121000010} is an apocalyptic number.

20100121000010 is a deficient number, since it is larger than the sum of its proper divisors (17698262963590).

20100121000010 is a wasteful number, since it uses less digits than its factorization.

20100121000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686245306.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20100121000010 its reverse (1000012100102), we get a palindrome (21100133100112).

The spelling of 20100121000010 in words is "twenty trillion, one hundred billion, one hundred twenty-one million, ten", and thus it is an aban number.