2121220121070 has 32 divisors (see below), whose sum is σ = 5209321974912. Its totient is φ = 552503845152.

The previous prime is 2121220121051. The next prime is 2121220121071. The reversal of 2121220121070 is 701210221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121220121071) by changing a digit.

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, 822177052 + ... + 822179631.

It is an arithmetic number, because the mean of its divisors is an integer number (162791311716).

Almost surely, 2^{2121220121070} is an apocalyptic number.

2121220121070 is an abundant number, since it is smaller than the sum of its proper divisors (3088101853842).

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

2121220121070 is a wasteful number, since it uses less digits than its factorization.

2121220121070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644356736.

The product of its (nonzero) digits is 224, while the sum is 21.

Adding to 2121220121070 its reverse (701210221212), we get a palindrome (2822430342282).

The spelling of 2121220121070 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, seventy".