102021211121121 has 24 divisors (see below), whose sum is σ = 147866067789440. Its totient is φ = 67782470240736.

The previous prime is 102021211121029. The next prime is 102021211121161. The reversal of 102021211121121 is 121121112120201.

It is a happy number.

102021211121121 is a `hidden beast` number, since 10 + 202 + 1 + 211 + 121 + 121 = 666.

It is not a de Polignac number, because 102021211121121 - 2¹¹ = 102021211119073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021211121094 and 102021211121103.

It is not an unprimeable number, because it can be changed into a prime (102021211121161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15766095 + ... + 21274683.

Almost surely, 2^{102021211121121} is an apocalyptic number.

It is an amenable number.

102021211121121 is a deficient number, since it is larger than the sum of its proper divisors (45844856668319).

102021211121121 is a wasteful number, since it uses less digits than its factorization.

102021211121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515605 (or 5515602 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 102021211121121 its reverse (121121112120201), we get a palindrome (223142323241322).

The spelling of 102021211121121 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".