20121212222110 has 64 divisors (see below), whose sum is σ = 38293535427840. Its totient is φ = 7603881626880.

The previous prime is 20121212222101. The next prime is 20121212222117. The reversal of 20121212222110 is 1122221212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121212222117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4586724 + ... + 7828183.

It is an arithmetic number, because the mean of its divisors is an integer number (598336491060).

Almost surely, 2^{20121212222110} is an apocalyptic number.

20121212222110 is a deficient number, since it is larger than the sum of its proper divisors (18172323205730).

20121212222110 is a wasteful number, since it uses less digits than its factorization.

20121212222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12415081.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20121212222110 its reverse (1122221212102), we get a palindrome (21243433434212).

The spelling of 20121212222110 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred ten".