2151121547226 has 32 divisors (see below), whose sum is σ = 4394959342848. Its totient is φ = 701595996480.

The previous prime is 2151121547213. The next prime is 2151121547227. The reversal of 2151121547226 is 6227451211512.

It is a super-3 number, since 3×2151121547226³ (a number of 38 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151121547227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30996 + ... + 2074416.

It is an arithmetic number, because the mean of its divisors is an integer number (137342479464).

Almost surely, 2^{2151121547226} is an apocalyptic number.

2151121547226 is an abundant number, since it is smaller than the sum of its proper divisors (2243837795622).

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

2151121547226 is a wasteful number, since it uses less digits than its factorization.

2151121547226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047206.

The product of its digits is 67200, while the sum is 39.

Adding to 2151121547226 its reverse (6227451211512), we get a palindrome (8378572758738).

The spelling of 2151121547226 in words is "two trillion, one hundred fifty-one billion, one hundred twenty-one million, five hundred forty-seven thousand, two hundred twenty-six".