121102021121 has 8 divisors (see below), whose sum is σ = 121882511400. Its totient is φ = 120321646848.

The previous prime is 121102021097. The next prime is 121102021123. The reversal of 121102021121 is 121120201121.

It can be written as a sum of positive squares in 4 ways, for example, as 47278414096 + 73823607025 = 217436^2 + 271705^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121102021121 is a prime.

It is a super-2 number, since 2×121102021121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121102021096 and 121102021105.

It is not an unprimeable number, because it can be changed into a prime (121102021123) 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, 3254795 + ... + 3291791.

It is an arithmetic number, because the mean of its divisors is an integer number (15235313925).

Almost surely, 2^121102021121 is an apocalyptic number.

It is an amenable number.

121102021121 is a deficient number, since it is larger than the sum of its proper divisors (780490279).

121102021121 is a wasteful number, since it uses less digits than its factorization.

121102021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58003.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121102021121 its reverse (121120201121), we get a palindrome (242222222242).

The spelling of 121102021121 in words is "one hundred twenty-one billion, one hundred two million, twenty-one thousand, one hundred twenty-one".