202121144342 has 32 divisors (see below), whose sum is σ = 331066673280. Its totient is φ = 91985961600.

The previous prime is 202121144339. The next prime is 202121144387. The reversal of 202121144342 is 243441121202.

It is a super-2 number, since 2×202121144342² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 1524092 + ... + 1651392.

It is an arithmetic number, because the mean of its divisors is an integer number (10345833540).

Almost surely, 2^202121144342 is an apocalyptic number.

202121144342 is a deficient number, since it is larger than the sum of its proper divisors (128945528938).

202121144342 is a wasteful number, since it uses less digits than its factorization.

202121144342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128168.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 202121144342 its reverse (243441121202), we get a palindrome (445562265544).

The spelling of 202121144342 in words is "two hundred two billion, one hundred twenty-one million, one hundred forty-four thousand, three hundred forty-two".