121031101421 has 4 divisors (see below), whose sum is σ = 121036502844. Its totient is φ = 121025700000.

The previous prime is 121031101409. The next prime is 121031101427. The reversal of 121031101421 is 124101130121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96232725796 + 24798375625 = 310214^2 + 157475^2 .

It is a cyclic number.

It is not a de Polignac number, because 121031101421 - 2⁶ = 121031101357 is a prime.

It is a super-3 number, since 3×121031101421³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121031101421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031101427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666960 + ... + 2711961.

It is an arithmetic number, because the mean of its divisors is an integer number (30259125711).

Almost surely, 2^121031101421 is an apocalyptic number.

It is an amenable number.

121031101421 is a deficient number, since it is larger than the sum of its proper divisors (5401423).

121031101421 is an equidigital number, since it uses as much as digits as its factorization.

121031101421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401422.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121031101421 its reverse (124101130121), we get a palindrome (245132231542).

The spelling of 121031101421 in words is "one hundred twenty-one billion, thirty-one million, one hundred one thousand, four hundred twenty-one".