121020120010 has 64 divisors (see below), whose sum is σ = 222845572224. Its totient is φ = 47311264000.

The previous prime is 121020119971. The next prime is 121020120017. The reversal of 121020120010 is 10021020121.

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 (121020120017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26062749 + ... + 26067391.

It is an arithmetic number, because the mean of its divisors is an integer number (3481962066).

Almost surely, 2^121020120010 is an apocalyptic number.

121020120010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121020120010 is a deficient number, since it is larger than the sum of its proper divisors (101825452214).

121020120010 is a wasteful number, since it uses less digits than its factorization.

121020120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079.

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

Adding to 121020120010 its reverse (10021020121), we get a palindrome (131041140131).

The spelling of 121020120010 in words is "one hundred twenty-one billion, twenty million, one hundred twenty thousand, ten".