1020121230000 has 200 divisors, whose sum is σ = 3342244489408. Its totient is φ = 267971616000.

The previous prime is 1020121229999. The next prime is 1020121230019. The reversal of 1020121230000 is 321210201.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1756239 + ... + 2263761.

Almost surely, 2^{1020121230000} is an apocalyptic number.

1020121230000 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 1020121230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1671122244704).

1020121230000 is an abundant number, since it is smaller than the sum of its proper divisors (2322123259408).

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

1020121230000 is an equidigital number, since it uses as much as digits as its factorization.

1020121230000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507621 (or 507600 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1020121230000 its reverse (321210201), we get a palindrome (1020442440201).

The spelling of 1020121230000 in words is "one trillion, twenty billion, one hundred twenty-one million, two hundred thirty thousand".