2121112121010 has 32 divisors (see below), whose sum is σ = 5090828719680. Its totient is φ = 565612162368.

The previous prime is 2121112120997. The next prime is 2121112121021. The reversal of 2121112121010 is 101212111212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121465 + ... + 2063244.

It is an arithmetic number, because the mean of its divisors is an integer number (159088397490).

Almost surely, 2^{2121112121010} is an apocalyptic number.

2121112121010 is an abundant number, since it is smaller than the sum of its proper divisors (2969716598670).

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

2121112121010 is a wasteful number, since it uses less digits than its factorization.

2121112121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217082.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121112121010 its reverse (101212111212), we get a palindrome (2222324232222).

The spelling of 2121112121010 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, ten".