12121012022210 has 80 divisors (see below), whose sum is σ = 27410504591736. Its totient is φ = 3836100409344.

The previous prime is 12121012022177. The next prime is 12121012022237. The reversal of 12121012022210 is 1222021012121.

It can be written as a sum of positive squares in 4 ways, for example, as 10369256537689 + 1751755484521 = 3220133^2 + 1323539^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19104479 + ... + 19728738.

Almost surely, 2^{12121012022210} is an apocalyptic number.

12121012022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121012022210 is an abundant number, since it is smaller than the sum of its proper divisors (15289492569526).

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

12121012022210 is an equidigital number, since it uses as much as digits as its factorization.

12121012022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38833265 (or 38833244 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121012022210 its reverse (1222021012121), we get a palindrome (13343033034331).

The spelling of 12121012022210 in words is "twelve trillion, one hundred twenty-one billion, twelve million, twenty-two thousand, two hundred ten".