102100122220021 has 8 divisors (see below), whose sum is σ = 107478623488320. Its totient is φ = 96722102014272.

The previous prime is 102100122219971. The next prime is 102100122220153. The reversal of 102100122220021 is 120022221001201.

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 102100122220021 - 2¹⁷ = 102100122088949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102100122219977 and 102100122220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100122226021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119829940 + ... + 120678973.

It is an arithmetic number, because the mean of its divisors is an integer number (13434827936040).

Almost surely, 2^{102100122220021} is an apocalyptic number.

It is an amenable number.

102100122220021 is a deficient number, since it is larger than the sum of its proper divisors (5378501268299).

102100122220021 is a wasteful number, since it uses less digits than its factorization.

102100122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240531275.

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

Adding to 102100122220021 its reverse (120022221001201), we get a palindrome (222122343221222).

The spelling of 102100122220021 in words is "one hundred two trillion, one hundred billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".