102121111021201 has 2 divisors, whose sum is σ = 102121111021202. Its totient is φ = 102121111021200.

The previous prime is 102121111021177. The next prime is 102121111021207. The reversal of 102121111021201 is 102120111121201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72834873892225 + 29286237128976 = 8534335^2 + 5411676^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121111021201 - 2⁹ = 102121111020689 is a prime.

It is not a weakly prime, because it can be changed into another prime (102121111021207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060555510600 + 51060555510601.

It is an arithmetic number, because the mean of its divisors is an integer number (51060555510601).

Almost surely, 2^{102121111021201} is an apocalyptic number.

It is an amenable number.

102121111021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121111021201 is an equidigital number, since it uses as much as digits as its factorization.

102121111021201 is an evil number, because the sum of its binary digits is even.

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

Adding to 102121111021201 its reverse (102120111121201), we get a palindrome (204241222142402).

The spelling of 102121111021201 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred one".