2120121770 has 32 divisors (see below), whose sum is σ = 4167676800. Its totient is φ = 771785280.

The previous prime is 2120121769. The next prime is 2120121811. The reversal of 2120121770 is 771210212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105620 + ... + 124079.

It is an arithmetic number, because the mean of its divisors is an integer number (130239900).

Almost surely, 2^2120121770 is an apocalyptic number.

2120121770 is a deficient number, since it is larger than the sum of its proper divisors (2047555030).

2120121770 is a wasteful number, since it uses less digits than its factorization.

2120121770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229790.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 2120121770 is about 46044.7800515976. The cubic root of 2120121770 is about 1284.6562530901.

Adding to 2120121770 its reverse (771210212), we get a palindrome (2891331982).

The spelling of 2120121770 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, seven hundred seventy".