121000001010 has 128 divisors (see below), whose sum is σ = 334594326528. Its totient is φ = 27432000000.

The previous prime is 121000000999. The next prime is 121000001093. The reversal of 121000001010 is 10100000121.

It is a Harshad number since it is a multiple of its sum of digits (6).

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 121000001010.

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, 23811670 + ... + 23816750.

It is an arithmetic number, because the mean of its divisors is an integer number (2614018176).

Almost surely, 2^121000001010 is an apocalyptic number.

121000001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121000001010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167297163264).

121000001010 is an abundant number, since it is smaller than the sum of its proper divisors (213594325518).

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

121000001010 is a wasteful number, since it uses less digits than its factorization.

121000001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 121000001010 its reverse (10100000121), we get a palindrome (131100001131).

The spelling of 121000001010 in words is "one hundred twenty-one billion, one thousand, ten".