102123201021 has 8 divisors (see below), whose sum is σ = 139485347904. Its totient is φ = 66421594080.

The previous prime is 102123200999. The next prime is 102123201029. The reversal of 102123201021 is 120102321201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102123201021 - 2⁶ = 102123200957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123201029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415134841 + ... + 415135086.

It is an arithmetic number, because the mean of its divisors is an integer number (17435668488).

Almost surely, 2^102123201021 is an apocalyptic number.

It is an amenable number.

102123201021 is a deficient number, since it is larger than the sum of its proper divisors (37362146883).

102123201021 is an equidigital number, since it uses as much as digits as its factorization.

102123201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830269971.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102123201021 its reverse (120102321201), we get a palindrome (222225522222).

The spelling of 102123201021 in words is "one hundred two billion, one hundred twenty-three million, two hundred one thousand, twenty-one".