212121310331210 has 384 divisors, whose sum is σ = 499625293824000. Its totient is φ = 64314946805760.

The previous prime is 212121310331143. The next prime is 212121310331401. The reversal of 212121310331210 is 12133013121212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4576587116 + ... + 4576633464.

It is an arithmetic number, because the mean of its divisors is an integer number (1301107536000).

Almost surely, 2^{212121310331210} is an apocalyptic number.

212121310331210 is an abundant number, since it is smaller than the sum of its proper divisors (287503983492790).

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

212121310331210 is a wasteful number, since it uses less digits than its factorization.

212121310331210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46934 (or 46927 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 212121310331210 its reverse (12133013121212), we get a palindrome (224254323452422).

The spelling of 212121310331210 in words is "two hundred twelve trillion, one hundred twenty-one billion, three hundred ten million, three hundred thirty-one thousand, two hundred ten".