121220220100211 has 16 divisors (see below), whose sum is σ = 123032105902080. Its totient is φ = 119421300697920.

The previous prime is 121220220100139. The next prime is 121220220100219. The reversal of 121220220100211 is 112001022022121.

It is a cyclic number.

It is not a de Polignac number, because 121220220100211 - 2¹⁴ = 121220220083827 is a prime.

It is a super-2 number, since 2×121220220100211² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121220220100211.

It is not an unprimeable number, because it can be changed into a prime (121220220100219) 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, 64658150 + ... + 66506516.

It is an arithmetic number, because the mean of its divisors is an integer number (7689506618880).

Almost surely, 2^{121220220100211} is an apocalyptic number.

121220220100211 is a deficient number, since it is larger than the sum of its proper divisors (1811885801869).

121220220100211 is a wasteful number, since it uses less digits than its factorization.

121220220100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851874.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121220220100211 its reverse (112001022022121), we get a palindrome (233221242122332).

The spelling of 121220220100211 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twenty million, one hundred thousand, two hundred eleven".