121011013420 has 144 divisors (see below), whose sum is σ = 283609710720. Its totient is φ = 43332157440.

The previous prime is 121011013381. The next prime is 121011013421. The reversal of 121011013420 is 24310110121.

It is a junction number, because it is equal to n+sod(n) for n = 121011013394 and 121011013403.

It is not an unprimeable number, because it can be changed into a prime (121011013421) 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 47 ways as a sum of consecutive naturals, for example, 110310312 + ... + 110311408.

It is an arithmetic number, because the mean of its divisors is an integer number (1969511880).

Almost surely, 2^121011013420 is an apocalyptic number.

121011013420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121011013420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141804855360).

121011013420 is an abundant number, since it is smaller than the sum of its proper divisors (162598697300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121011013420 is a wasteful number, since it uses less digits than its factorization.

121011013420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121011013420 its reverse (24310110121), we get a palindrome (145321123541).

The spelling of 121011013420 in words is "one hundred twenty-one billion, eleven million, thirteen thousand, four hundred twenty".