202132121240 has 128 divisors (see below), whose sum is σ = 522410342400. Its totient is φ = 68951139840.

The previous prime is 202132121203. The next prime is 202132121251. The reversal of 202132121240 is 42121231202.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47907851 + ... + 47912069.

It is an arithmetic number, because the mean of its divisors is an integer number (4081330800).

Almost surely, 2^202132121240 is an apocalyptic number.

202132121240 is a gapful number since it is divisible by the number (20) 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 202132121240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261205171200).

202132121240 is an abundant number, since it is smaller than the sum of its proper divisors (320278221160).

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

202132121240 is a wasteful number, since it uses less digits than its factorization.

202132121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 202132121240 its reverse (42121231202), we get a palindrome (244253352442).

The spelling of 202132121240 in words is "two hundred two billion, one hundred thirty-two million, one hundred twenty-one thousand, two hundred forty".