121322509993 has 2 divisors, whose sum is σ = 121322509994. Its totient is φ = 121322509992.

The previous prime is 121322509909. The next prime is 121322510093. The reversal of 121322509993 is 399905223121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84897642384 + 36424867609 = 291372^2 + 190853^2 .

It is a cyclic number.

It is not a de Polignac number, because 121322509993 - 2¹⁷ = 121322378921 is a prime.

It is not a weakly prime, because it can be changed into another prime (121322509093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60661254996 + 60661254997.

It is an arithmetic number, because the mean of its divisors is an integer number (60661254997).

Almost surely, 2^121322509993 is an apocalyptic number.

It is an amenable number.

121322509993 is a deficient number, since it is larger than the sum of its proper divisors (1).

121322509993 is an equidigital number, since it uses as much as digits as its factorization.

121322509993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 46.

The spelling of 121322509993 in words is "one hundred twenty-one billion, three hundred twenty-two million, five hundred nine thousand, nine hundred ninety-three".