121021121011 has 8 divisors (see below), whose sum is σ = 138323971584. Its totient is φ = 103721800200.

The previous prime is 121021121009. The next prime is 121021121059. The reversal of 121021121011 is 110121120121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121021121011 - 2¹ = 121021121009 is a prime.

It is a super-2 number, since 2×121021121011² (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 = 121021120982 and 121021121000.

It is not an unprimeable number, because it can be changed into a prime (121021121071) 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, 808555 + ... + 946468.

It is an arithmetic number, because the mean of its divisors is an integer number (17290496448).

Almost surely, 2^121021121011 is an apocalyptic number.

121021121011 is a deficient number, since it is larger than the sum of its proper divisors (17302850573).

121021121011 is an equidigital number, since it uses as much as digits as its factorization.

121021121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764881.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121021121011 its reverse (110121120121), we get a palindrome (231142241132).

The spelling of 121021121011 in words is "one hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, eleven".