121212220222011 has 16 divisors (see below), whose sum is σ = 165565183408128. Its totient is φ = 78833869281600.

The previous prime is 121212220222003. The next prime is 121212220222033. The reversal of 121212220222011 is 110222022212121.

It is not a de Polignac number, because 121212220222011 - 2³ = 121212220222003 is a prime.

It is a super-2 number, since 2×121212220222011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121212220222711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18008995 + ... + 23806476.

It is an arithmetic number, because the mean of its divisors is an integer number (10347823963008).

Almost surely, 2^{121212220222011} is an apocalyptic number.

121212220222011 is a deficient number, since it is larger than the sum of its proper divisors (44352963186117).

121212220222011 is a wasteful number, since it uses less digits than its factorization.

121212220222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41839082.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121212220222011 its reverse (110222022212121), we get a palindrome (231434242434132).

The spelling of 121212220222011 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty-two thousand, eleven".