21100121300012 has 12 divisors (see below), whose sum is σ = 36965744896416. Its totient is φ = 10538479901040.

The previous prime is 21100121299987. The next prime is 21100121300029. The reversal of 21100121300012 is 21000312100112.

It is a super-2 number, since 2×21100121300012² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21100121300012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2895183143 + ... + 2895190430.

It is an arithmetic number, because the mean of its divisors is an integer number (3080478741368).

Almost surely, 2^{21100121300012} is an apocalyptic number.

It is an amenable number.

21100121300012 is a deficient number, since it is larger than the sum of its proper divisors (15865623596404).

21100121300012 is a wasteful number, since it uses less digits than its factorization.

21100121300012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790374488 (or 5790374486 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21100121300012 its reverse (21000312100112), we get a palindrome (42100433400124).

The spelling of 21100121300012 in words is "twenty-one trillion, one hundred billion, one hundred twenty-one million, three hundred thousand, twelve".