121211020011021 has 8 divisors (see below), whose sum is σ = 161663037571200. Its totient is φ = 80783174562432.

The previous prime is 121211020010947. The next prime is 121211020011041. The reversal of 121211020011021 is 120110020112121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121211020011021 - 2¹⁷ = 121211019879949 is a prime.

It is a super-2 number, since 2×121211020011021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211020011041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6043016196 + ... + 6043036253.

It is an arithmetic number, because the mean of its divisors is an integer number (20207879696400).

Almost surely, 2^{121211020011021} is an apocalyptic number.

It is an amenable number.

121211020011021 is a deficient number, since it is larger than the sum of its proper divisors (40452017560179).

121211020011021 is a wasteful number, since it uses less digits than its factorization.

121211020011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12086055795.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121211020011021 its reverse (120110020112121), we get a palindrome (241321040123142).

The spelling of 121211020011021 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty million, eleven thousand, twenty-one".