1020201321000 has 128 divisors (see below), whose sum is σ = 3185345928960. Its totient is φ = 271855584000.

The previous prime is 1020201320993. The next prime is 1020201321017. The reversal of 1020201321000 is 1231020201.

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 31 ways as a sum of consecutive naturals, for example, 4019877 + ... + 4266123.

It is an arithmetic number, because the mean of its divisors is an integer number (24885515070).

Almost surely, 2^{1020201321000} is an apocalyptic number.

1020201321000 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 1020201321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592672964480).

1020201321000 is an abundant number, since it is smaller than the sum of its proper divisors (2165144607960).

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

1020201321000 is a wasteful number, since it uses less digits than its factorization.

1020201321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247652 (or 247638 counting only the distinct ones).

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

Adding to 1020201321000 its reverse (1231020201), we get a palindrome (1021432341201).

The spelling of 1020201321000 in words is "one trillion, twenty billion, two hundred one million, three hundred twenty-one thousand".