20120021210011 has 4 divisors (see below), whose sum is σ = 20121437428992. Its totient is φ = 20118604991032.

The previous prime is 20120021209993. The next prime is 20120021210063. The reversal of 20120021210011 is 11001212002102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120021210011 - 2³⁵ = 20085661471643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120021209973 and 20120021210000.

It is not an unprimeable number, because it can be changed into a prime (20120021210411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708088180 + ... + 708116593.

It is an arithmetic number, because the mean of its divisors is an integer number (5030359357248).

Almost surely, 2^{20120021210011} is an apocalyptic number.

20120021210011 is a deficient number, since it is larger than the sum of its proper divisors (1416218981).

20120021210011 is a wasteful number, since it uses less digits than its factorization.

20120021210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416218980.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120021210011 its reverse (11001212002102), we get a palindrome (31121233212113).

The spelling of 20120021210011 in words is "twenty trillion, one hundred twenty billion, twenty-one million, two hundred ten thousand, eleven".