102120202120121 has 8 divisors (see below), whose sum is σ = 105746939745024. Its totient is φ = 98514248092560.

The previous prime is 102120202120109. The next prime is 102120202120147. The reversal of 102120202120121 is 121021202021201.

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 102120202120121 - 2³⁰ = 102119128378297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102120202120121.

It is not an unprimeable number, because it can be changed into a prime (102120202120421) 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, 5195889335 + ... + 5195908988.

It is an arithmetic number, because the mean of its divisors is an integer number (13218367468128).

Almost surely, 2^{102120202120121} is an apocalyptic number.

It is an amenable number.

102120202120121 is a deficient number, since it is larger than the sum of its proper divisors (3626737624903).

102120202120121 is a wasteful number, since it uses less digits than its factorization.

102120202120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10391798671.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102120202120121 its reverse (121021202021201), we get a palindrome (223141404141322).

The spelling of 102120202120121 in words is "one hundred two trillion, one hundred twenty billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".