121022212021111 has 2 divisors, whose sum is σ = 121022212021112. Its totient is φ = 121022212021110.

The previous prime is 121022212021103. The next prime is 121022212021127. The reversal of 121022212021111 is 111120212220121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121022212021111 - 2³ = 121022212021103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121022212021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511106010555 + 60511106010556.

It is an arithmetic number, because the mean of its divisors is an integer number (60511106010556).

Almost surely, 2^{121022212021111} is an apocalyptic number.

121022212021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022212021111 is an equidigital number, since it uses as much as digits as its factorization.

121022212021111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121022212021111 its reverse (111120212220121), we get a palindrome (232142424241232).

The spelling of 121022212021111 in words is "one hundred twenty-one trillion, twenty-two billion, two hundred twelve million, twenty-one thousand, one hundred eleven".