20110011010021 has 16 divisors (see below), whose sum is σ = 20573708369328. Its totient is φ = 19651956480000.

The previous prime is 20110011009973. The next prime is 20110011010031. The reversal of 20110011010021 is 12001011001102.

It can be written as a sum of positive squares in 8 ways, for example, as 940587685921 + 19169423324100 = 969839^2 + 4378290^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110011010021 - 2⁹ = 20110011009509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110011010031) 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, 3280771 + ... + 7140271.

It is an arithmetic number, because the mean of its divisors is an integer number (1285856773083).

Almost surely, 2^{20110011010021} is an apocalyptic number.

It is an amenable number.

20110011010021 is a deficient number, since it is larger than the sum of its proper divisors (463697359307).

20110011010021 is a wasteful number, since it uses less digits than its factorization.

20110011010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860232.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20110011010021 its reverse (12001011001102), we get a palindrome (32111022011123).

The spelling of 20110011010021 in words is "twenty trillion, one hundred ten billion, eleven million, ten thousand, twenty-one".