201212323400 has 48 divisors (see below), whose sum is σ = 510347625840. Its totient is φ = 73168116800.

The previous prime is 201212323373. The next prime is 201212323423. The reversal of 201212323400 is 4323212102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 45727874 + ... + 45732273.

It is an arithmetic number, because the mean of its divisors is an integer number (10632242205).

Almost surely, 2^201212323400 is an apocalyptic number.

201212323400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212323400 is an abundant number, since it is smaller than the sum of its proper divisors (309135302440).

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

201212323400 is a wasteful number, since it uses less digits than its factorization.

201212323400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91460174 (or 91460165 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 201212323400 its reverse (4323212102), we get a palindrome (205535535502).

The spelling of 201212323400 in words is "two hundred one billion, two hundred twelve million, three hundred twenty-three thousand, four hundred".