121100212122211 has 16 divisors (see below), whose sum is σ = 139957701923520. Its totient is φ = 102632127206400.

The previous prime is 121100212122209. The next prime is 121100212122269. The reversal of 121100212122211 is 112221212001121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121100212122211 - 2¹ = 121100212122209 is a prime.

It is a super-2 number, since 2×121100212122211² (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 (121100212122011) 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, 35342011 + ... + 38616811.

It is an arithmetic number, because the mean of its divisors is an integer number (8747356370220).

Almost surely, 2^{121100212122211} is an apocalyptic number.

121100212122211 is a deficient number, since it is larger than the sum of its proper divisors (18857489801309).

121100212122211 is an equidigital number, since it uses as much as digits as its factorization.

121100212122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334254.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121100212122211 its reverse (112221212001121), we get a palindrome (233321424123332).

The spelling of 121100212122211 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, one hundred twenty-two thousand, two hundred eleven".