121012202021251 has 2 divisors, whose sum is σ = 121012202021252. Its totient is φ = 121012202021250.

The previous prime is 121012202021197. The next prime is 121012202021267. The reversal of 121012202021251 is 152120202210121.

It is a strong prime.

It is an emirp because it is prime and its reverse (152120202210121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121012202021251 - 2⁹ = 121012202020739 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012202021951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506101010625 + 60506101010626.

It is an arithmetic number, because the mean of its divisors is an integer number (60506101010626).

Almost surely, 2^{121012202021251} is an apocalyptic number.

121012202021251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012202021251 is an equidigital number, since it uses as much as digits as its factorization.

121012202021251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 121012202021251 its reverse (152120202210121), we get a palindrome (273132404231372).

The spelling of 121012202021251 in words is "one hundred twenty-one trillion, twelve billion, two hundred two million, twenty-one thousand, two hundred fifty-one".