20121112121210 has 16 divisors (see below), whose sum is σ = 36218259909792. Its totient is φ = 8048387494800.

The previous prime is 20121112121183. The next prime is 20121112121249. The reversal of 20121112121210 is 1212121112102.

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, 5681036 + ... + 8515655.

It is an arithmetic number, because the mean of its divisors is an integer number (2263641244362).

Almost surely, 2^{20121112121210} is an apocalyptic number.

20121112121210 is a deficient number, since it is larger than the sum of its proper divisors (16097147788582).

20121112121210 is a wasteful number, since it uses less digits than its factorization.

20121112121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14338429.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20121112121210 its reverse (1212121112102), we get a palindrome (21333233233312).

The spelling of 20121112121210 in words is "twenty trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred ten".