121221020200110 has 32 divisors (see below), whose sum is σ = 290930800730112. Its totient is φ = 32325566247840.

The previous prime is 121221020200099. The next prime is 121221020200121. The reversal of 121221020200110 is 11002020122121.

It is an interprime number because it is at equal distance from previous prime (121221020200099) and next prime (121221020200121).

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221020200110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29646867 + ... + 33486993.

It is an arithmetic number, because the mean of its divisors is an integer number (9091587522816).

Almost surely, 2^{121221020200110} is an apocalyptic number.

121221020200110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221020200110 is an abundant number, since it is smaller than the sum of its proper divisors (169709780530002).

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

121221020200110 is a wasteful number, since it uses less digits than its factorization.

121221020200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892368.

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

Adding to 121221020200110 its reverse (11002020122121), we get a palindrome (132223040322231).

The spelling of 121221020200110 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred thousand, one hundred ten".