21110001201210 has 64 divisors (see below), whose sum is σ = 51341794842240. Its totient is φ = 5554201697280.

The previous prime is 21110001201151. The next prime is 21110001201269. The reversal of 21110001201210 is 1210210001112.

It is an interprime number because it is at equal distance from previous prime (21110001201151) and next prime (21110001201269).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3675355 + ... + 7465134.

It is an arithmetic number, because the mean of its divisors is an integer number (802215544410).

Almost surely, 2^{21110001201210} is an apocalyptic number.

21110001201210 is an abundant number, since it is smaller than the sum of its proper divisors (30231793641030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110001201210 is a wasteful number, since it uses less digits than its factorization.

21110001201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141343.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21110001201210 its reverse (1210210001112), we get a palindrome (22320211202322).

The spelling of 21110001201210 in words is "twenty-one trillion, one hundred ten billion, one million, two hundred one thousand, two hundred ten".