2121331011 has 16 divisors (see below), whose sum is σ = 2844914688. Its totient is φ = 1406008800.

The previous prime is 2121331007. The next prime is 2121331031. The reversal of 2121331011 is 1101331212.

It is a happy number.

It is not a de Polignac number, because 2121331011 - 2² = 2121331007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121331001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385006 + ... + 390476.

It is an arithmetic number, because the mean of its divisors is an integer number (177807168).

Almost surely, 2^2121331011 is an apocalyptic number.

2121331011 is a deficient number, since it is larger than the sum of its proper divisors (723583677).

2121331011 is a wasteful number, since it uses less digits than its factorization.

2121331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6202.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2121331011 is about 46057.9093207670. The cubic root of 2121331011 is about 1284.9004472023.

Adding to 2121331011 its reverse (1101331212), we get a palindrome (3222662223).

The spelling of 2121331011 in words is "two billion, one hundred twenty-one million, three hundred thirty-one thousand, eleven".