121031200 has 36 divisors (see below), whose sum is σ = 295469370. Its totient is φ = 48412160.

The previous prime is 121031149. The next prime is 121031201. The reversal of 121031200 is 2130121.

It can be written as a sum of positive squares in 3 ways, for example, as 106254864 + 14776336 = 10308^2 + 3844^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121031201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74845 + ... + 76444.

Almost surely, 2^121031200 is an apocalyptic number.

121031200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121031200 is an abundant number, since it is smaller than the sum of its proper divisors (174438170).

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

121031200 is a wasteful number, since it uses less digits than its factorization.

121031200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151309 (or 151296 counting only the distinct ones).

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

The square root of 121031200 is about 11001.4180904100. The cubic root of 121031200 is about 494.6512524974.

Adding to 121031200 its reverse (2130121), we get a palindrome (123161321).

The spelling of 121031200 in words is "one hundred twenty-one million, thirty-one thousand, two hundred".