20002121101011 has 24 divisors (see below), whose sum is σ = 32377794983680. Its totient is φ = 10757443277952.

The previous prime is 20002121100971. The next prime is 20002121101021. The reversal of 20002121101011 is 11010112120002.

It is not a de Polignac number, because 20002121101011 - 2¹⁵ = 20002121068243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002121101021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1647886591 + ... + 1647898728.

Almost surely, 2^{20002121101011} is an apocalyptic number.

20002121101011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20002121101011 is a deficient number, since it is larger than the sum of its proper divisors (12375673882669).

20002121101011 is a wasteful number, since it uses less digits than its factorization.

20002121101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295785363 (or 3295785346 counting only the distinct ones).

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

Adding to 20002121101011 its reverse (11010112120002), we get a palindrome (31012233221013).

The spelling of 20002121101011 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred one thousand, eleven".