102100212220021 has 8 divisors (see below), whose sum is σ = 102200820800000. Its totient is φ = 101999633823360.

The previous prime is 102100212220003. The next prime is 102100212220037. The reversal of 102100212220021 is 120022212001201.

It is a happy number.

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 102100212220021 - 2⁵ = 102100212219989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100212219977 and 102100212220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100212220001) 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, 774165 + ... + 14310826.

It is an arithmetic number, because the mean of its divisors is an integer number (12775102600000).

Almost surely, 2^{102100212220021} is an apocalyptic number.

It is an amenable number.

102100212220021 is a deficient number, since it is larger than the sum of its proper divisors (100608579979).

102100212220021 is a wasteful number, since it uses less digits than its factorization.

102100212220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15091659.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102100212220021 its reverse (120022212001201), we get a palindrome (222122424221222).

The spelling of 102100212220021 in words is "one hundred two trillion, one hundred billion, two hundred twelve million, two hundred twenty thousand, twenty-one".