102121121122121 has 8 divisors (see below), whose sum is σ = 103581149280840. Its totient is φ = 100670604547968.

The previous prime is 102121121122103. The next prime is 102121121122159. The reversal of 102121121122121 is 121221121121201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17713904846521 + 84407216275600 = 4208789^2 + 9187340^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102121121122121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121121122093 and 102121121122102.

It is not an unprimeable number, because it can be changed into a prime (102121121142121) 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, 2377874516 + ... + 2377917461.

It is an arithmetic number, because the mean of its divisors is an integer number (12947643660105).

Almost surely, 2^{102121121122121} is an apocalyptic number.

It is an amenable number.

102121121122121 is a deficient number, since it is larger than the sum of its proper divisors (1460028158719).

102121121122121 is a wasteful number, since it uses less digits than its factorization.

102121121122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755792283.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 102121121122121 its reverse (121221121121201), we get a palindrome (223342242243322).

The spelling of 102121121122121 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".