2121231451 has 16 divisors (see below), whose sum is σ = 2230778880. Its totient is φ = 2014619040.

The previous prime is 2121231439. The next prime is 2121231481. The reversal of 2121231451 is 1541321212.

It is a cyclic number.

It is not a de Polignac number, because 2121231451 - 2¹⁵ = 2121198683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121231481) 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, 358620 + ... + 364486.

It is an arithmetic number, because the mean of its divisors is an integer number (139423680).

Almost surely, 2^2121231451 is an apocalyptic number.

2121231451 is a deficient number, since it is larger than the sum of its proper divisors (109547429).

2121231451 is a wasteful number, since it uses less digits than its factorization.

2121231451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114.

The product of its digits is 480, while the sum is 22.

The square root of 2121231451 is about 46056.8284948063. The cubic root of 2121231451 is about 1284.8803455634.

Adding to 2121231451 its reverse (1541321212), we get a palindrome (3662552663).

The spelling of 2121231451 in words is "two billion, one hundred twenty-one million, two hundred thirty-one thousand, four hundred fifty-one".