121202220121011 has 8 divisors (see below), whose sum is σ = 179558844623760. Its totient is φ = 80801480080656.

The previous prime is 121202220120913. The next prime is 121202220121013. The reversal of 121202220121011 is 110121022202121.

121202220121011 is a `hidden beast` number, since 1 + 21 + 202 + 220 + 1 + 210 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-121202220121011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121202220121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244485557770 + ... + 2244485557823.

It is an arithmetic number, because the mean of its divisors is an integer number (22444855577970).

Almost surely, 2^{121202220121011} is an apocalyptic number.

121202220121011 is a deficient number, since it is larger than the sum of its proper divisors (58356624502749).

121202220121011 is an equidigital number, since it uses as much as digits as its factorization.

121202220121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488971115602 (or 4488971115596 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121202220121011 its reverse (110121022202121), we get a palindrome (231323242323132).

The spelling of 121202220121011 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred twenty million, one hundred twenty-one thousand, eleven".