102122145245021 has 16 divisors (see below), whose sum is σ = 117989005363200. Its totient is φ = 87355209914880.

The previous prime is 102122145244991. The next prime is 102122145245059. The reversal of 102122145245021 is 120542541221201.

It is a cyclic number.

It is not a de Polignac number, because 102122145245021 - 2¹⁰ = 102122145243997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102122145247021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68089496 + ... + 69573153.

It is an arithmetic number, because the mean of its divisors is an integer number (7374312835200).

Almost surely, 2^{102122145245021} is an apocalyptic number.

102122145245021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102122145245021 is a deficient number, since it is larger than the sum of its proper divisors (15866860118179).

102122145245021 is a wasteful number, since it uses less digits than its factorization.

102122145245021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137666644.

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 102122145245021 its reverse (120542541221201), we get a palindrome (222664686466222).

The spelling of 102122145245021 in words is "one hundred two trillion, one hundred twenty-two billion, one hundred forty-five million, two hundred forty-five thousand, twenty-one".