1002121021000 has 64 divisors (see below), whose sum is σ = 2558141688960. Its totient is φ = 364407640000.

The previous prime is 1002121020991. The next prime is 1002121021039. The reversal of 1002121021000 is 1201212001.

It is a super-4 number, since 4×1002121021000⁴ (a number of 49 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45539956 + ... + 45561955.

It is an arithmetic number, because the mean of its divisors is an integer number (39970963890).

Almost surely, 2^{1002121021000} is an apocalyptic number.

1002121021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002121021000 is an abundant number, since it is smaller than the sum of its proper divisors (1556020667960).

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

1002121021000 is a wasteful number, since it uses less digits than its factorization.

1002121021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91101943 (or 91101929 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1002121021000 its reverse (1201212001), we get a palindrome (1003322233001).

The spelling of 1002121021000 in words is "one trillion, two billion, one hundred twenty-one million, twenty-one thousand".