121221222001963 has 2 divisors, whose sum is σ = 121221222001964. Its totient is φ = 121221222001962.

The previous prime is 121221222001949. The next prime is 121221222001973. The reversal of 121221222001963 is 369100222122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221222001963 - 2³⁷ = 121083783048491 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221222001973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610611000981 + 60610611000982.

It is an arithmetic number, because the mean of its divisors is an integer number (60610611000982).

Almost surely, 2^{121221222001963} is an apocalyptic number.

121221222001963 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221222001963 is an equidigital number, since it uses as much as digits as its factorization.

121221222001963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 121221222001963 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, one thousand, nine hundred sixty-three".