201021612 has 48 divisors (see below), whose sum is σ = 513004800. Its totient is φ = 60759360.

The previous prime is 201021593. The next prime is 201021631. The reversal of 201021612 is 216120102.

It is an interprime number because it is at equal distance from previous prime (201021593) and next prime (201021631).

It is a junction number, because it is equal to n+sod(n) for n = 201021591 and 201021600.

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 15 ways as a sum of consecutive naturals, for example, 56214 + ... + 59682.

It is an arithmetic number, because the mean of its divisors is an integer number (10687600).

Almost surely, 2^201021612 is an apocalyptic number.

201021612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201021612 is an abundant number, since it is smaller than the sum of its proper divisors (311983188).

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

201021612 is a wasteful number, since it uses less digits than its factorization.

201021612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926 (or 3924 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 201021612 is about 14178.2090547431. The cubic root of 201021612 is about 585.7975942123.

Adding to 201021612 its reverse (216120102), we get a palindrome (417141714).

The spelling of 201021612 in words is "two hundred one million, twenty-one thousand, six hundred twelve".