201212033420 has 48 divisors (see below), whose sum is σ = 441622268640. Its totient is φ = 76908324864.

The previous prime is 201212033389. The next prime is 201212033431. The reversal of 201212033420 is 24330212102.

It is a super-2 number, since 2×201212033420² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 201212033392 and 201212033401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1731974 + ... + 1844493.

It is an arithmetic number, because the mean of its divisors is an integer number (9200463930).

Almost surely, 2^201212033420 is an apocalyptic number.

201212033420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212033420 is an abundant number, since it is smaller than the sum of its proper divisors (240410235220).

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

201212033420 is a wasteful number, since it uses less digits than its factorization.

201212033420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576602 (or 3576600 counting only the distinct ones).

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

Adding to 201212033420 its reverse (24330212102), we get a palindrome (225542245522).

The spelling of 201212033420 in words is "two hundred one billion, two hundred twelve million, thirty-three thousand, four hundred twenty".