121011020 has 48 divisors (see below), whose sum is σ = 274887648. Its totient is φ = 44482560.

The previous prime is 121011017. The next prime is 121011043. The reversal of 121011020 is 20110121.

It is a super-2 number, since 2×121011020² = 29287333922880800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121010989 and 121011007.

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, 65915 + ... + 67725.

It is an arithmetic number, because the mean of its divisors is an integer number (5726826).

Almost surely, 2^121011020 is an apocalyptic number.

121011020 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 121011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137443824).

121011020 is an abundant number, since it is smaller than the sum of its proper divisors (153876628).

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

121011020 is a wasteful number, since it uses less digits than its factorization.

121011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121011020 is about 11000.5008976864. The cubic root of 121011020 is about 494.6237592640.

Adding to 121011020 its reverse (20110121), we get a palindrome (141121141).

The spelling of 121011020 in words is "one hundred twenty-one million, eleven thousand, twenty".