121011020200 has 192 divisors, whose sum is σ = 333846489600. Its totient is φ = 39912499200.

The previous prime is 121011020191. The next prime is 121011020231. The reversal of 121011020200 is 2020110121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11403297 + ... + 11413903.

It is an arithmetic number, because the mean of its divisors is an integer number (1738783800).

Almost surely, 2^121011020200 is an apocalyptic number.

121011020200 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 121011020200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166923244800).

121011020200 is an abundant number, since it is smaller than the sum of its proper divisors (212835469400).

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

121011020200 is a wasteful number, since it uses less digits than its factorization.

121011020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10940 (or 10931 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121011020200 its reverse (2020110121), we get a palindrome (123031130321).

It can be divided in two parts, 12101 and 1020200, that added together give a palindrome (1032301).

The spelling of 121011020200 in words is "one hundred twenty-one billion, eleven million, twenty thousand, two hundred".