100021121021 has 8 divisors (see below), whose sum is σ = 100150553664. Its totient is φ = 99891741600.

The previous prime is 100021121003. The next prime is 100021121059. The reversal of 100021121021 is 120121120001.

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 100021121021 - 2¹⁴ = 100021104637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100021120993 and 100021121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021123021) 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, 4856696 + ... + 4877246.

It is an arithmetic number, because the mean of its divisors is an integer number (12518819208).

Almost surely, 2^100021121021 is an apocalyptic number.

It is an amenable number.

100021121021 is a deficient number, since it is larger than the sum of its proper divisors (129432643).

100021121021 is an equidigital number, since it uses as much as digits as its factorization.

100021121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26611.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100021121021 its reverse (120121120001), we get a palindrome (220142241022).

The spelling of 100021121021 in words is "one hundred billion, twenty-one million, one hundred twenty-one thousand, twenty-one".