102100212021 has 8 divisors (see below), whose sum is σ = 136135162944. Its totient is φ = 68066034560.

The previous prime is 102100212017. The next prime is 102100212031. The reversal of 102100212021 is 120212001201.

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 102100212021 - 2² = 102100212017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102100211988 and 102100212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100212001) 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, 280645 + ... + 531941.

It is an arithmetic number, because the mean of its divisors is an integer number (17016895368).

Almost surely, 2^102100212021 is an apocalyptic number.

It is an amenable number.

102100212021 is a deficient number, since it is larger than the sum of its proper divisors (34034950923).

102100212021 is a wasteful number, since it uses less digits than its factorization.

102100212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386731.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102100212021 its reverse (120212001201), we get a palindrome (222312213222).

The spelling of 102100212021 in words is "one hundred two billion, one hundred million, two hundred twelve thousand, twenty-one".