1000021212240 has 160 divisors (see below), whose sum is σ = 3131555817600. Its totient is φ = 263975774208.

The previous prime is 1000021212199. The next prime is 1000021212241. The reversal of 1000021212240 is 422121200001.

1000021212240 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021212241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10429959 + ... + 10525401.

It is an arithmetic number, because the mean of its divisors is an integer number (19572223860).

Almost surely, 2^{1000021212240} is an apocalyptic number.

1000021212240 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 1000021212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565777908800).

1000021212240 is an abundant number, since it is smaller than the sum of its proper divisors (2131534605360).

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

1000021212240 is a wasteful number, since it uses less digits than its factorization.

1000021212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95901 (or 95895 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1000021212240 its reverse (422121200001), we get a palindrome (1422142412241).

The spelling of 1000021212240 in words is "one trillion, twenty-one million, two hundred twelve thousand, two hundred forty".