121004541020 has 48 divisors (see below), whose sum is σ = 286769397600. Its totient is φ = 42484350720.

The previous prime is 121004541017. The next prime is 121004541067. The reversal of 121004541020 is 20145400121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121004540983 and 121004541001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9476735 + ... + 9489494.

It is an arithmetic number, because the mean of its divisors is an integer number (5974362450).

Almost surely, 2^121004541020 is an apocalyptic number.

121004541020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121004541020 is an abundant number, since it is smaller than the sum of its proper divisors (165764856580).

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

121004541020 is a wasteful number, since it uses less digits than its factorization.

121004541020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18966278 (or 18966276 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 121004541020 its reverse (20145400121), we get a palindrome (141149941141).

The spelling of 121004541020 in words is "one hundred twenty-one billion, four million, five hundred forty-one thousand, twenty".