20101102121020 has 48 divisors (see below), whose sum is σ = 42457578458400. Its totient is φ = 7993726661376.

The previous prime is 20101102120927. The next prime is 20101102121033. The reversal of 20101102121020 is 2012120110102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158276506 + ... + 158403454.

It is an arithmetic number, because the mean of its divisors is an integer number (884532884550).

Almost surely, 2^{20101102121020} is an apocalyptic number.

20101102121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101102121020 is an abundant number, since it is smaller than the sum of its proper divisors (22356476337380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101102121020 is a wasteful number, since it uses less digits than its factorization.

20101102121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172894 (or 172892 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20101102121020 its reverse (2012120110102), we get a palindrome (22113222231122).

The spelling of 20101102121020 in words is "twenty trillion, one hundred one billion, one hundred two million, one hundred twenty-one thousand, twenty".