121221111133061 has 2 divisors, whose sum is σ = 121221111133062. Its totient is φ = 121221111133060.

The previous prime is 121221111132943. The next prime is 121221111133097. The reversal of 121221111133061 is 160331111122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119944245032836 + 1276866100225 = 10951906^2 + 1129985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221111133061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121221111133061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221111132061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610555566530 + 60610555566531.

It is an arithmetic number, because the mean of its divisors is an integer number (60610555566531).

Almost surely, 2^{121221111133061} is an apocalyptic number.

It is an amenable number.

121221111133061 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221111133061 is an equidigital number, since it uses as much as digits as its factorization.

121221111133061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

Adding to 121221111133061 its reverse (160331111122121), we get a palindrome (281552222255182).

The spelling of 121221111133061 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thirty-three thousand, sixty-one".