121221110039 has 2 divisors, whose sum is σ = 121221110040. Its totient is φ = 121221110038.

The previous prime is 121221110011. The next prime is 121221110107. The reversal of 121221110039 is 930011122121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221110039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121221109996 and 121221110023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221110009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610555019 + 60610555020.

It is an arithmetic number, because the mean of its divisors is an integer number (60610555020).

Almost surely, 2^121221110039 is an apocalyptic number.

121221110039 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221110039 is an equidigital number, since it uses as much as digits as its factorization.

121221110039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 121221110039 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, thirty-nine".