20001121011123 has 32 divisors (see below), whose sum is σ = 30658053857280. Its totient is φ = 11361734231040.

The previous prime is 20001121011121. The next prime is 20001121011133. The reversal of 20001121011123 is 32111012110002.

It is not a de Polignac number, because 20001121011123 - 2¹ = 20001121011121 is a prime.

It is a super-2 number, since 2×20001121011123² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001121011121) 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, 4297911 + ... + 7646847.

It is an arithmetic number, because the mean of its divisors is an integer number (958064183040).

Almost surely, 2^{20001121011123} is an apocalyptic number.

20001121011123 is a deficient number, since it is larger than the sum of its proper divisors (10656932846157).

20001121011123 is a wasteful number, since it uses less digits than its factorization.

20001121011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350627.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20001121011123 its reverse (32111012110002), we get a palindrome (52112133121125).

The spelling of 20001121011123 in words is "twenty trillion, one billion, one hundred twenty-one million, eleven thousand, one hundred twenty-three".