121221110021211 has 96 divisors (see below), whose sum is σ = 192170135439360. Its totient is φ = 73346731200000.

The previous prime is 121221110021111. The next prime is 121221110021213. The reversal of 121221110021211 is 112120011122121.

It is a happy number.

121221110021211 is a `hidden beast` number, since 1 + 212 + 211 + 10 + 0 + 21 + 211 = 666.

It is not a de Polignac number, because 121221110021211 - 2¹⁸ = 121221109759067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221110021213) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5204621476 + ... + 5204644766.

It is an arithmetic number, because the mean of its divisors is an integer number (2001772244160).

Almost surely, 2^{121221110021211} is an apocalyptic number.

121221110021211 is a deficient number, since it is larger than the sum of its proper divisors (70949025418149).

121221110021211 is a wasteful number, since it uses less digits than its factorization.

121221110021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33169 (or 33166 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121221110021211 its reverse (112120011122121), we get a palindrome (233341121143332).

The spelling of 121221110021211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, twenty-one thousand, two hundred eleven".