121020212111 has 2 divisors, whose sum is σ = 121020212112. Its totient is φ = 121020212110.

The previous prime is 121020212099. The next prime is 121020212129. The reversal of 121020212111 is 111212020121.

It is a weak prime.

It is an emirp because it is prime and its reverse (111212020121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121020212111 - 2¹⁴ = 121020195727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121020212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510106055 + 60510106056.

It is an arithmetic number, because the mean of its divisors is an integer number (60510106056).

Almost surely, 2^121020212111 is an apocalyptic number.

121020212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020212111 is an equidigital number, since it uses as much as digits as its factorization.

121020212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121020212111 its reverse (111212020121), we get a palindrome (232232232232).

The spelling of 121020212111 in words is "one hundred twenty-one billion, twenty million, two hundred twelve thousand, one hundred eleven".