121121113020 has 48 divisors (see below), whose sum is σ = 341012843808. Its totient is φ = 32120513280.

The previous prime is 121121113013. The next prime is 121121113031. The reversal of 121121113020 is 20311121121.

It is a super-2 number, since 2×121121113020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 5565619 + ... + 5587338.

It is an arithmetic number, because the mean of its divisors is an integer number (7104434246).

Almost surely, 2^121121113020 is an apocalyptic number.

121121113020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121113020 is an abundant number, since it is smaller than the sum of its proper divisors (219891730788).

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

121121113020 is a wasteful number, since it uses less digits than its factorization.

121121113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11153150 (or 11153148 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121121113020 its reverse (20311121121), we get a palindrome (141432234141).

The spelling of 121121113020 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred thirteen thousand, twenty".