123021132 has 96 divisors (see below), whose sum is σ = 325140480. Its totient is φ = 35938560.

The previous prime is 123021127. The next prime is 123021139. The reversal of 123021132 is 231120321.

It is a super-2 number, since 2×123021132² = 30268397837122848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123021139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321013 + ... + 321395.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^123021132 is an apocalyptic number.

123021132 is a gapful number since it is divisible by the number (12) 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 123021132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162570240).

123021132 is an abundant number, since it is smaller than the sum of its proper divisors (202119348).

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

123021132 is a wasteful number, since it uses less digits than its factorization.

123021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123021132 is about 11091.4891696291. The cubic root of 123021132 is about 497.3474623051.

Adding to 123021132 its reverse (231120321), we get a palindrome (354141453).

The spelling of 123021132 in words is "one hundred twenty-three million, twenty-one thousand, one hundred thirty-two".