121100120120210 has 192 divisors, whose sum is σ = 281072218420224. Its totient is φ = 36754847754240.

The previous prime is 121100120120201. The next prime is 121100120120249. The reversal of 121100120120210 is 12021021001121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 77651642 + ... + 79195818.

It is an arithmetic number, because the mean of its divisors is an integer number (1463917804272).

Almost surely, 2^{121100120120210} is an apocalyptic number.

121100120120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121100120120210 is an abundant number, since it is smaller than the sum of its proper divisors (159972098300014).

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

121100120120210 is a wasteful number, since it uses less digits than its factorization.

121100120120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544457 (or 1544446 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121100120120210 its reverse (12021021001121), we get a palindrome (133121141121331).

The spelling of 121100120120210 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twenty million, one hundred twenty thousand, two hundred ten".