121421301289 has 2 divisors, whose sum is σ = 121421301290. Its totient is φ = 121421301288.

The previous prime is 121421301269. The next prime is 121421301359. The reversal of 121421301289 is 982103124121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90049806889 + 31371494400 = 300083^2 + 177120^2 .

It is a cyclic number.

It is not a de Polignac number, because 121421301289 - 2³⁵ = 87061562921 is a prime.

It is a super-2 number, since 2×121421301289² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121421301259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710650644 + 60710650645.

It is an arithmetic number, because the mean of its divisors is an integer number (60710650645).

Almost surely, 2^121421301289 is an apocalyptic number.

It is an amenable number.

121421301289 is a deficient number, since it is larger than the sum of its proper divisors (1).

121421301289 is an equidigital number, since it uses as much as digits as its factorization.

121421301289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 121421301289 in words is "one hundred twenty-one billion, four hundred twenty-one million, three hundred one thousand, two hundred eighty-nine".