121021100021010 has 64 divisors (see below), whose sum is σ = 351469682088192. Its totient is φ = 26034791264256.

The previous prime is 121021100020999. The next prime is 121021100021011. The reversal of 121021100021010 is 10120001120121.

It is a super-2 number, since 2×121021100021010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021100021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16949730327 + ... + 16949737466.

It is an arithmetic number, because the mean of its divisors is an integer number (5491713782628).

Almost surely, 2^{121021100021010} is an apocalyptic number.

121021100021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021100021010 is an abundant number, since it is smaller than the sum of its proper divisors (230448582067182).

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

121021100021010 is a wasteful number, since it uses less digits than its factorization.

121021100021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33899467827.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121021100021010 its reverse (10120001120121), we get a palindrome (131141101141131).

The spelling of 121021100021010 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred million, twenty-one thousand, ten".