121020212011 has 6 divisors (see below), whose sum is σ = 125337224012. Its totient is φ = 116847100440.

The previous prime is 121020212003. The next prime is 121020212023. The reversal of 121020212011 is 110212020121.

It is not a de Polignac number, because 121020212011 - 2³ = 121020212003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020211982 and 121020212000.

It is not an unprimeable number, because it can be changed into a prime (121020212111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71949345 + ... + 71951026.

Almost surely, 2^121020212011 is an apocalyptic number.

121020212011 is a deficient number, since it is larger than the sum of its proper divisors (4317012001).

121020212011 is an equidigital number, since it uses as much as digits as its factorization.

121020212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143900429 (or 143900400 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121020212011 its reverse (110212020121), we get a palindrome (231232232132).

The spelling of 121020212011 in words is "one hundred twenty-one billion, twenty million, two hundred twelve thousand, eleven".