202121133144 has 64 divisors (see below), whose sum is σ = 607883116800. Its totient is φ = 54709478784.

The previous prime is 202121133107. The next prime is 202121133251. The reversal of 202121133144 is 441331121202.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 31657387 + ... + 31663770.

It is an arithmetic number, because the mean of its divisors is an integer number (9498173700).

Almost surely, 2^202121133144 is an apocalyptic number.

202121133144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

202121133144 is an abundant number, since it is smaller than the sum of its proper divisors (405761983656).

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

202121133144 is a wasteful number, since it uses less digits than its factorization.

202121133144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63321192 (or 63321188 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 202121133144 its reverse (441331121202), we get a palindrome (643452254346).

The spelling of 202121133144 in words is "two hundred two billion, one hundred twenty-one million, one hundred thirty-three thousand, one hundred forty-four".