21311212102210 has 16 divisors (see below), whose sum is σ = 39597607003392. Its totient is φ = 8249501458800.

The previous prime is 21311212102177. The next prime is 21311212102231. The reversal of 21311212102210 is 1220121211312.

It is a super-2 number, since 2×21311212102210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34372922436 + ... + 34372923055.

It is an arithmetic number, because the mean of its divisors is an integer number (2474850437712).

Almost surely, 2^{21311212102210} is an apocalyptic number.

21311212102210 is a deficient number, since it is larger than the sum of its proper divisors (18286394901182).

21311212102210 is a wasteful number, since it uses less digits than its factorization.

21311212102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68745845529.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21311212102210 its reverse (1220121211312), we get a palindrome (22531333313522).

The spelling of 21311212102210 in words is "twenty-one trillion, three hundred eleven billion, two hundred twelve million, one hundred two thousand, two hundred ten".