21100120201012 has 24 divisors (see below), whose sum is σ = 39101124560904. Its totient is φ = 9928492326912.

The previous prime is 21100120201009. The next prime is 21100120201037. The reversal of 21100120201012 is 21010202100112.

It can be written as a sum of positive squares in 4 ways, for example, as 1470311454096 + 19629808746916 = 1212564^2 + 4430554^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21100120200983 and 21100120201001.

It is a congruent number.

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, 14552923 + ... + 15936994.

It is an arithmetic number, because the mean of its divisors is an integer number (1629213523371).

Almost surely, 2^{21100120201012} is an apocalyptic number.

It is an amenable number.

21100120201012 is a deficient number, since it is larger than the sum of its proper divisors (18001004359892).

21100120201012 is a wasteful number, since it uses less digits than its factorization.

21100120201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30500115 (or 30500113 counting only the distinct ones).

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

Adding to 21100120201012 its reverse (21010202100112), we get a palindrome (42110322301124).

The spelling of 21100120201012 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, two hundred one thousand, twelve".