21000112001210 has 8 divisors (see below), whose sum is σ = 37800201602196. Its totient is φ = 8400044800480.

The previous prime is 21000112001191. The next prime is 21000112001251. The reversal of 21000112001210 is 1210021100012.

It can be written as a sum of positive squares in 2 ways, for example, as 18339797685001 + 2660314316209 = 4282499^2 + 1631047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21000112001191 and 21000112001200.

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, 1050005600051 + ... + 1050005600070.

Almost surely, 2^{21000112001210} is an apocalyptic number.

21000112001210 is a deficient number, since it is larger than the sum of its proper divisors (16800089600986).

21000112001210 is a wasteful number, since it uses less digits than its factorization.

21000112001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100011200128.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000112001210 its reverse (1210021100012), we get a palindrome (22210133101222).

The spelling of 21000112001210 in words is "twenty-one trillion, one hundred twelve million, one thousand, two hundred ten".