201021132 has 24 divisors (see below), whose sum is σ = 505130416. Its totient is φ = 61852608.

The previous prime is 201021113. The next prime is 201021133. The reversal of 201021132 is 231120102.

It is a super-2 number, since 2×201021132² = 80818991021122848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (201021133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644143 + ... + 644454.

Almost surely, 2^201021132 is an apocalyptic number.

It is an amenable number.

201021132 is an abundant number, since it is smaller than the sum of its proper divisors (304109284).

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

201021132 is a wasteful number, since it uses less digits than its factorization.

201021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288617 (or 1288615 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 201021132 is about 14178.1921273483. The cubic root of 201021132 is about 585.7971279555.

Adding to 201021132 its reverse (231120102), we get a palindrome (432141234).

The spelling of 201021132 in words is "two hundred one million, twenty-one thousand, one hundred thirty-two".