121221122010 has 32 divisors (see below), whose sum is σ = 300962787840. Its totient is φ = 31210955328.

The previous prime is 121221121997. The next prime is 121221122021. The reversal of 121221122010 is 10221122121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

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, 69666442 + ... + 69668181.

It is an arithmetic number, because the mean of its divisors is an integer number (9405087120).

Almost surely, 2^121221122010 is an apocalyptic number.

121221122010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221122010 is an abundant number, since it is smaller than the sum of its proper divisors (179741665830).

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

121221122010 is a wasteful number, since it uses less digits than its factorization.

121221122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139334662.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221122010 its reverse (10221122121), we get a palindrome (131442244131).

The spelling of 121221122010 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, ten".