121023100 has 72 divisors (see below), whose sum is σ = 288262800. Its totient is φ = 43737600.

The previous prime is 121023083. The next prime is 121023143. The reversal of 121023100 is 1320121.

It is a super-2 number, since 2×121023100² = 29293181467220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295696 + ... + 296104.

It is an arithmetic number, because the mean of its divisors is an integer number (4003650).

Almost surely, 2^121023100 is an apocalyptic number.

121023100 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 121023100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144131400).

121023100 is an abundant number, since it is smaller than the sum of its proper divisors (167239700).

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

121023100 is a wasteful number, since it uses less digits than its factorization.

121023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 121023100 is about 11001.0499498911. The cubic root of 121023100 is about 494.6402174240.

Adding to 121023100 its reverse (1320121), we get a palindrome (122343221).

It can be divided in two parts, 1210 and 23100, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 121023100 in words is "one hundred twenty-one million, twenty-three thousand, one hundred".