102120202212121 has 4 divisors (see below), whose sum is σ = 102121416264244. Its totient is φ = 102118988160000.

The previous prime is 102120202212107. The next prime is 102120202212179. The reversal of 102120202212121 is 121212202021201.

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 17582548854025 + 84537653358096 = 4193155^2 + 9194436^2 .

It is a cyclic number.

It is not a de Polignac number, because 102120202212121 - 2¹⁵ = 102120202179353 is a prime.

It is a super-3 number, since 3×102120202212121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102120202212181) 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, 606899880 + ... + 607068121.

It is an arithmetic number, because the mean of its divisors is an integer number (25530354066061).

Almost surely, 2^{102120202212121} is an apocalyptic number.

It is an amenable number.

102120202212121 is a deficient number, since it is larger than the sum of its proper divisors (1214052123).

102120202212121 is an equidigital number, since it uses as much as digits as its factorization.

102120202212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214052122.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102120202212121 its reverse (121212202021201), we get a palindrome (223332404233322).

The spelling of 102120202212121 in words is "one hundred two trillion, one hundred twenty billion, two hundred two million, two hundred twelve thousand, one hundred twenty-one".