121211110073 has 2 divisors, whose sum is σ = 121211110074. Its totient is φ = 121211110072.

The previous prime is 121211110061. The next prime is 121211110129. The reversal of 121211110073 is 370011112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91245076624 + 29966033449 = 302068^2 + 173107^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211110073 - 2¹⁸ = 121210847929 is a prime.

It is not a weakly prime, because it can be changed into another prime (121211110873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605555036 + 60605555037.

It is an arithmetic number, because the mean of its divisors is an integer number (60605555037).

Almost surely, 2^121211110073 is an apocalyptic number.

It is an amenable number.

121211110073 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211110073 is an equidigital number, since it uses as much as digits as its factorization.

121211110073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 121211110073 its reverse (370011112121), we get a palindrome (491222222194).

The spelling of 121211110073 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, seventy-three".