121211020020011 has 4 divisors (see below), whose sum is σ = 121379602802400. Its totient is φ = 121042437237624.

The previous prime is 121211020019963. The next prime is 121211020020037. The reversal of 121211020020011 is 110020020112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121211020020011 - 2²² = 121211015825707 is a prime.

It is a super-2 number, since 2×121211020020011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211020020511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84291390116 + ... + 84291391553.

It is an arithmetic number, because the mean of its divisors is an integer number (30344900700600).

Almost surely, 2^{121211020020011} is an apocalyptic number.

121211020020011 is a deficient number, since it is larger than the sum of its proper divisors (168582782389).

121211020020011 is an equidigital number, since it uses as much as digits as its factorization.

121211020020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168582782388.

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

Adding to 121211020020011 its reverse (110020020112121), we get a palindrome (231231040132132).

The spelling of 121211020020011 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty million, twenty thousand, eleven".