201021392 has 80 divisors (see below), whose sum is σ = 462553728. Its totient is φ = 83427840.

The previous prime is 201021367. The next prime is 201021419. The reversal of 201021392 is 293120102.

201021392 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 235238 + ... + 236090.

Almost surely, 2^201021392 is an apocalyptic number.

201021392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201021392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231276864).

201021392 is an abundant number, since it is smaller than the sum of its proper divisors (261532336).

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

201021392 is a wasteful number, since it uses less digits than its factorization.

201021392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 201021392 is about 14178.2012963563. The cubic root of 201021392 is about 585.7973805114.

Adding to 201021392 its reverse (293120102), we get a palindrome (494141494).

The spelling of 201021392 in words is "two hundred one million, twenty-one thousand, three hundred ninety-two".