1000021200121 has 8 divisors (see below), whose sum is σ = 1032298848000. Its totient is φ = 967744733520.

The previous prime is 1000021200119. The next prime is 1000021200137. The reversal of 1000021200121 is 1210021200001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000021200121 - 2¹ = 1000021200119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000021200098 and 1000021200107.

It is not an unprimeable number, because it can be changed into a prime (1000021200161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1623015 + ... + 2152723.

It is an arithmetic number, because the mean of its divisors is an integer number (129037356000).

Almost surely, 2^{1000021200121} is an apocalyptic number.

It is an amenable number.

1000021200121 is a deficient number, since it is larger than the sum of its proper divisors (32277647879).

1000021200121 is an equidigital number, since it uses as much as digits as its factorization.

1000021200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590639.

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

Adding to 1000021200121 its reverse (1210021200001), we get a palindrome (2210042400122).

The spelling of 1000021200121 in words is "one trillion, twenty-one million, two hundred thousand, one hundred twenty-one".