121010110001000 has 256 divisors, whose sum is σ = 312033574045440. Its totient is φ = 43558320000000.

The previous prime is 121010110000981. The next prime is 121010110001047. The reversal of 121010110001000 is 100011010121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6644881895 + ... + 6644900105.

It is an arithmetic number, because the mean of its divisors is an integer number (1218881148615).

Almost surely, 2^{121010110001000} is an apocalyptic number.

121010110001000 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 121010110001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156016787022720).

121010110001000 is an abundant number, since it is smaller than the sum of its proper divisors (191023464044440).

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

121010110001000 is a wasteful number, since it uses less digits than its factorization.

121010110001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24325 (or 24311 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 121010110001000 its reverse (100011010121), we get a palindrome (121110121011121).

The spelling of 121010110001000 in words is "one hundred twenty-one trillion, ten billion, one hundred ten million, one thousand".