121221020202010 has 32 divisors (see below), whose sum is σ = 224694320729472. Its totient is φ = 47059109697600.

The previous prime is 121221020201993. The next prime is 121221020202019. The reversal of 121221020202010 is 10202020122121.

It is a happy number.

It is a super-2 number, since 2×121221020202010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121221020202019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897732966 + ... + 897867985.

It is an arithmetic number, because the mean of its divisors is an integer number (7021697522796).

Almost surely, 2^{121221020202010} is an apocalyptic number.

121221020202010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221020202010 is a deficient number, since it is larger than the sum of its proper divisors (103473300527462).

121221020202010 is a wasteful number, since it uses less digits than its factorization.

121221020202010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795601158.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121221020202010 its reverse (10202020122121), we get a palindrome (131423040324131).

The spelling of 121221020202010 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred two thousand, ten".