121210110000 has 600 divisors, whose sum is σ = 486658144544. Its totient is φ = 27578880000.

The previous prime is 121210109983. The next prime is 121210110013. The reversal of 121210110000 is 11012121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 265229772 + ... + 265230228.

Almost surely, 2^121210110000 is an apocalyptic number.

121210110000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121210110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243329072272).

121210110000 is an abundant number, since it is smaller than the sum of its proper divisors (365448034544).

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

121210110000 is a wasteful number, since it uses less digits than its factorization.

121210110000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121210110000 its reverse (11012121), we get a palindrome (121221122121).

The spelling of 121210110000 in words is "one hundred twenty-one billion, two hundred ten million, one hundred ten thousand".