10000021121121 has 8 divisors (see below), whose sum is σ = 13336359794944. Its totient is φ = 6665181597360.

The previous prime is 10000021121099. The next prime is 10000021121149. The reversal of 10000021121121 is 12112112000001.

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

It is not a de Polignac number, because 10000021121121 - 2¹⁸ = 10000020858977 is a prime.

It is a super-2 number, since 2×10000021121121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10000021121097 and 10000021121106.

It is not an unprimeable number, because it can be changed into a prime (10000021121171) 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, 374771950 + ... + 374798631.

It is an arithmetic number, because the mean of its divisors is an integer number (1667044974368).

Almost surely, 2^{10000021121121} is an apocalyptic number.

It is an amenable number.

10000021121121 is a deficient number, since it is larger than the sum of its proper divisors (3336338673823).

10000021121121 is an equidigital number, since it uses as much as digits as its factorization.

10000021121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749575031.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10000021121121 its reverse (12112112000001), we get a palindrome (22112133121122).

The spelling of 10000021121121 in words is "ten trillion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".