20002111000121 has 16 divisors (see below), whose sum is σ = 21578596608384. Its totient is φ = 18470067343104.

The previous prime is 20002111000103. The next prime is 20002111000133. The reversal of 20002111000121 is 12100011120002.

It is a cyclic number.

It is not a de Polignac number, because 20002111000121 - 2²² = 20002106805817 is a prime.

It is a super-2 number, since 2×20002111000121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002111000021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116257466 + ... + 116429388.

It is an arithmetic number, because the mean of its divisors is an integer number (1348662288024).

Almost surely, 2^{20002111000121} is an apocalyptic number.

It is an amenable number.

20002111000121 is a deficient number, since it is larger than the sum of its proper divisors (1576485608263).

20002111000121 is a wasteful number, since it uses less digits than its factorization.

20002111000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301120.

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

Adding to 20002111000121 its reverse (12100011120002), we get a palindrome (32102122120123).

The spelling of 20002111000121 in words is "twenty trillion, two billion, one hundred eleven million, one hundred twenty-one", and thus it is an aban number.