231212100312210 has 128 divisors (see below), whose sum is σ = 575990932608000. Its totient is φ = 59354993018880.

The previous prime is 231212100312203. The next prime is 231212100312233. The reversal of 231212100312210 is 12213001212132.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158340516 + ... + 159794064.

It is an arithmetic number, because the mean of its divisors is an integer number (4499929161000).

Almost surely, 2^{231212100312210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231212100312210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287995466304000).

231212100312210 is an abundant number, since it is smaller than the sum of its proper divisors (344778832295790).

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

231212100312210 is a wasteful number, since it uses less digits than its factorization.

231212100312210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455316.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 231212100312210 its reverse (12213001212132), we get a palindrome (243425101524342).

The spelling of 231212100312210 in words is "two hundred thirty-one trillion, two hundred twelve billion, one hundred million, three hundred twelve thousand, two hundred ten".