121001100001000 has 32 divisors (see below), whose sum is σ = 283142574004680. Its totient is φ = 48400440000000.

The previous prime is 121001100000929. The next prime is 121001100001003. The reversal of 121001100001000 is 100001100121.

It can be written as a sum of positive squares in 4 ways, for example, as 21519745767844 + 99481354233156 = 4638938^2 + 9974034^2 .

It is not an unprimeable number, because it can be changed into a prime (121001100001003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60500549001 + ... + 60500551000.

Almost surely, 2^{121001100001000} is an apocalyptic number.

121001100001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001100001000 is an abundant number, since it is smaller than the sum of its proper divisors (162141474003680).

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

121001100001000 is a wasteful number, since it uses less digits than its factorization.

121001100001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121001100022 (or 121001100008 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 121001100001000 its reverse (100001100121), we get a palindrome (121101101101121).

The spelling of 121001100001000 in words is "one hundred twenty-one trillion, one billion, one hundred million, one thousand".