121121014421 has 4 divisors (see below), whose sum is σ = 132132015744. Its totient is φ = 110110013100.

The previous prime is 121121014331. The next prime is 121121014429. The reversal of 121121014421 is 124410121121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121014421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121121014393 and 121121014402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121014429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5505500645 + ... + 5505500666.

It is an arithmetic number, because the mean of its divisors is an integer number (33033003936).

Almost surely, 2^121121014421 is an apocalyptic number.

121121014421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121121014421 is a deficient number, since it is larger than the sum of its proper divisors (11011001323).

121121014421 is a wasteful number, since it uses less digits than its factorization.

121121014421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011001322.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121121014421 its reverse (124410121121), we get a palindrome (245531135542).

The spelling of 121121014421 in words is "one hundred twenty-one billion, one hundred twenty-one million, fourteen thousand, four hundred twenty-one".