22121353437502 has 16 divisors (see below), whose sum is σ = 36210945583872. Its totient is φ = 10051725311320.

The previous prime is 22121353437479. The next prime is 22121353437523. The reversal of 22121353437502 is 20573435312122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171701248 + ... + 171830035.

It is an arithmetic number, because the mean of its divisors is an integer number (2263184098992).

Almost surely, 2^{22121353437502} is an apocalyptic number.

22121353437502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22121353437502 is a deficient number, since it is larger than the sum of its proper divisors (14089592146370).

22121353437502 is a wasteful number, since it uses less digits than its factorization.

22121353437502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343534223.

The product of its (nonzero) digits is 302400, while the sum is 40.

Adding to 22121353437502 its reverse (20573435312122), we get a palindrome (42694788749624).

The spelling of 22121353437502 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred fifty-three million, four hundred thirty-seven thousand, five hundred two".