21010211011012 has 6 divisors (see below), whose sum is σ = 36767869269278. Its totient is φ = 10505105505504.

The previous prime is 21010211010983. The next prime is 21010211011073. The reversal of 21010211011012 is 21011011201012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16756774998016 + 4253436012996 = 4093504^2 + 2062386^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21010211010983 and 21010211011001.

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, 2626276376373 + ... + 2626276376380.

Almost surely, 2^{21010211011012} is an apocalyptic number.

It is an amenable number.

21010211011012 is a deficient number, since it is larger than the sum of its proper divisors (15757658258266).

21010211011012 is a wasteful number, since it uses less digits than its factorization.

21010211011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252552752757 (or 5252552752755 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21010211011012 its reverse (21011011201012), we get a palindrome (42021222212024).

The spelling of 21010211011012 in words is "twenty-one trillion, ten billion, two hundred eleven million, eleven thousand, twelve".