121220021211101 has 2 divisors, whose sum is σ = 121220021211102. Its totient is φ = 121220021211100.

The previous prime is 121220021211041. The next prime is 121220021211227. The reversal of 121220021211101 is 101112120022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98654576115001 + 22565445096100 = 9932501^2 + 4750310^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220021211101 - 2¹⁰ = 121220021210077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121220021211101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220821211101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610010605550 + 60610010605551.

It is an arithmetic number, because the mean of its divisors is an integer number (60610010605551).

Almost surely, 2^{121220021211101} is an apocalyptic number.

It is an amenable number.

121220021211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220021211101 is an equidigital number, since it uses as much as digits as its factorization.

121220021211101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121220021211101 its reverse (101112120022121), we get a palindrome (222332141233222).

The spelling of 121220021211101 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred eleven thousand, one hundred one".