121021011000000 has 1176 divisors, whose sum is σ = 466668782188128. Its totient is φ = 29873664000000.

The previous prime is 121021010999981. The next prime is 121021011000007. The reversal of 121021011000000 is 110120121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (121021011000007) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 9332993517 + ... + 9333006483.

Almost surely, 2^{121021011000000} is an apocalyptic number.

121021011000000 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 121021011000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233334391094064).

121021011000000 is an abundant number, since it is smaller than the sum of its proper divisors (345647771188128).

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

121021011000000 is an equidigital number, since it uses as much as digits as its factorization.

121021011000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13093 (or 13055 counting only the distinct ones).

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

Adding to 121021011000000 its reverse (110120121), we get a palindrome (121021121120121).

The spelling of 121021011000000 in words is "one hundred twenty-one trillion, twenty-one billion, eleven million", and thus it is an aban number.