102011123021 has 8 divisors (see below), whose sum is σ = 102098134944. Its totient is φ = 101924146800.

The previous prime is 102011123017. The next prime is 102011123047. The reversal of 102011123021 is 120321110201.

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

It is a cyclic number.

It is not a de Polignac number, because 102011123021 - 2² = 102011123017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102011122987 and 102011123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011122021) 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, 9731435 + ... + 9741911.

It is an arithmetic number, because the mean of its divisors is an integer number (12762266868).

Almost surely, 2^102011123021 is an apocalyptic number.

It is an amenable number.

102011123021 is a deficient number, since it is larger than the sum of its proper divisors (87011923).

102011123021 is a wasteful number, since it uses less digits than its factorization.

102011123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17851.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 102011123021 its reverse (120321110201), we get a palindrome (222332233222).

The spelling of 102011123021 in words is "one hundred two billion, eleven million, one hundred twenty-three thousand, twenty-one".