121000020021210 has 128 divisors (see below), whose sum is σ = 330968988783360. Its totient is φ = 28041429248000.

The previous prime is 121000020021161. The next prime is 121000020021211. The reversal of 121000020021210 is 12120020000121.

It is not an unprimeable number, because it can be changed into a prime (121000020021211) 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 63 ways as a sum of consecutive naturals, for example, 61625907 + ... + 63559046.

It is an arithmetic number, because the mean of its divisors is an integer number (2585695224870).

Almost surely, 2^{121000020021210} is an apocalyptic number.

121000020021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121000020021210 is an abundant number, since it is smaller than the sum of its proper divisors (209968968762150).

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

121000020021210 is a wasteful number, since it uses less digits than its factorization.

121000020021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125185104.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121000020021210 its reverse (12120020000121), we get a palindrome (133120040021331).

The spelling of 121000020021210 in words is "one hundred twenty-one trillion, twenty million, twenty-one thousand, two hundred ten".