121101020 has 24 divisors (see below), whose sum is σ = 256834368. Its totient is φ = 47960000.

The previous prime is 121101011. The next prime is 121101023. The reversal of 121101020 is 20101121.

It is a junction number, because it is equal to n+sod(n) for n = 121100989 and 121101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27956 + ... + 31995.

It is an arithmetic number, because the mean of its divisors is an integer number (10701432).

Almost surely, 2^121101020 is an apocalyptic number.

121101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101020 is an abundant number, since it is smaller than the sum of its proper divisors (135733348).

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

121101020 is a wasteful number, since it uses less digits than its factorization.

121101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60061 (or 60059 counting only the distinct ones).

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

The square root of 121101020 is about 11004.5908601819. The cubic root of 121101020 is about 494.7463516991.

Adding to 121101020 its reverse (20101121), we get a palindrome (141202141).

The spelling of 121101020 in words is "one hundred twenty-one million, one hundred one thousand, twenty".