3121801420 has 24 divisors (see below), whose sum is σ = 6615932400. Its totient is φ = 1237263552.

The previous prime is 3121801411. The next prime is 3121801421. The reversal of 3121801420 is 241081213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3121801391 and 3121801400.

It is not an unprimeable number, because it can be changed into a prime (3121801421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713830 + ... + 718189.

It is an arithmetic number, because the mean of its divisors is an integer number (275663850).

Almost surely, 2^3121801420 is an apocalyptic number.

It is an amenable number.

3121801420 is an abundant number, since it is smaller than the sum of its proper divisors (3494130980).

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

3121801420 is a wasteful number, since it uses less digits than its factorization.

3121801420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432137 (or 1432135 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 3121801420 is about 55873.0831438538. The cubic root of 3121801420 is about 1461.5098879093.

Adding to 3121801420 its reverse (241081213), we get a palindrome (3362882633).

It can be divided in two parts, 312180 and 1420, that added together give a square (313600 = 560²).

The spelling of 3121801420 in words is "three billion, one hundred twenty-one million, eight hundred one thousand, four hundred twenty".