102020120121121 has 4 divisors (see below), whose sum is σ = 102020253810244. Its totient is φ = 102019986432000.

The previous prime is 102020120121109. The next prime is 102020120121137. The reversal of 102020120121121 is 121121021020201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98142922837521 + 3877197283600 = 9906711^2 + 1969060^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020120121121 - 2¹⁷ = 102020119990049 is a prime.

It is a super-3 number, since 3×102020120121121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020120121095 and 102020120121104.

It is not an unprimeable number, because it can be changed into a prime (102020120121181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65693280 + ... + 67228321.

It is an arithmetic number, because the mean of its divisors is an integer number (25505063452561).

Almost surely, 2^{102020120121121} is an apocalyptic number.

It is an amenable number.

102020120121121 is a deficient number, since it is larger than the sum of its proper divisors (133689123).

102020120121121 is an equidigital number, since it uses as much as digits as its factorization.

102020120121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133689122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102020120121121 its reverse (121121021020201), we get a palindrome (223141141141322).

The spelling of 102020120121121 in words is "one hundred two trillion, twenty billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".