2121256235 has 32 divisors (see below), whose sum is σ = 3086499840. Its totient is φ = 1367114112.

The previous prime is 2121256229. The next prime is 2121256271. The reversal of 2121256235 is 5326521212.

It is not a de Polignac number, because 2121256235 - 2¹⁰ = 2121255211 is a prime.

It is a super-3 number, since 3×2121256235³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121256198 and 2121256207.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71897 + ... + 97013.

It is an arithmetic number, because the mean of its divisors is an integer number (96453120).

Almost surely, 2^2121256235 is an apocalyptic number.

2121256235 is a deficient number, since it is larger than the sum of its proper divisors (965243605).

2121256235 is a wasteful number, since it uses less digits than its factorization.

2121256235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25275.

The product of its digits is 7200, while the sum is 29.

The square root of 2121256235 is about 46057.0975529288. The cubic root of 2121256235 is about 1284.8853496301.

Adding to 2121256235 its reverse (5326521212), we get a palindrome (7447777447).

The spelling of 2121256235 in words is "two billion, one hundred twenty-one million, two hundred fifty-six thousand, two hundred thirty-five".