121121000021011 has 2 divisors, whose sum is σ = 121121000021012. Its totient is φ = 121121000021010.

The previous prime is 121121000020949. The next prime is 121121000021081. The reversal of 121121000021011 is 110120000121121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121121000021011 - 2¹⁵ = 121120999988243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121121000020982 and 121121000021000.

It is not a weakly prime, because it can be changed into another prime (121121000021081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560500010505 + 60560500010506.

It is an arithmetic number, because the mean of its divisors is an integer number (60560500010506).

Almost surely, 2^{121121000021011} is an apocalyptic number.

121121000021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121000021011 is an equidigital number, since it uses as much as digits as its factorization.

121121000021011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121121000021011 its reverse (110120000121121), we get a palindrome (231241000142132).

The spelling of 121121000021011 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-one thousand, eleven".