21000100012210 has 32 divisors (see below), whose sum is σ = 41817356659584. Its totient is φ = 7528845072000.

The previous prime is 21000100012183. The next prime is 21000100012219. The reversal of 21000100012210 is 1221000100012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21000100012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344428811 + ... + 1344444430.

It is an arithmetic number, because the mean of its divisors is an integer number (1306792395612).

Almost surely, 2^{21000100012210} is an apocalyptic number.

21000100012210 is a deficient number, since it is larger than the sum of its proper divisors (20817256647374).

21000100012210 is a wasteful number, since it uses less digits than its factorization.

21000100012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688873330.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000100012210 its reverse (1221000100012), we get a palindrome (22221100112222).

The spelling of 21000100012210 in words is "twenty-one trillion, one hundred million, twelve thousand, two hundred ten".