312221001420 has 144 divisors (see below), whose sum is σ = 1019777260320. Its totient is φ = 77033146368.

The previous prime is 312221001397. The next prime is 312221001451. The reversal of 312221001420 is 24100122213.

It is a happy number.

312221001420 is a `hidden beast` number, since 31 + 2 + 2 + 210 + 0 + 1 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 312221001393 and 312221001402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 684147 + ... + 1045226.

It is an arithmetic number, because the mean of its divisors is an integer number (7081786530).

Almost surely, 2^312221001420 is an apocalyptic number.

312221001420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312221001420 is an abundant number, since it is smaller than the sum of its proper divisors (707556258900).

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

312221001420 is a wasteful number, since it uses less digits than its factorization.

312221001420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729464 (or 1729459 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 312221001420 its reverse (24100122213), we get a palindrome (336321123633).

The spelling of 312221001420 in words is "three hundred twelve billion, two hundred twenty-one million, one thousand, four hundred twenty".