20021300031111 has 16 divisors (see below), whose sum is σ = 27033216000000. Its totient is φ = 13178461671648.

The previous prime is 20021300031079. The next prime is 20021300031121. The reversal of 20021300031111 is 11113000312002.

It is a happy number.

It is not a de Polignac number, because 20021300031111 - 2⁵ = 20021300031079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021300031121) 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, 33068890 + ... + 33668888.

It is an arithmetic number, because the mean of its divisors is an integer number (1689576000000).

Almost surely, 2^{20021300031111} is an apocalyptic number.

20021300031111 is a deficient number, since it is larger than the sum of its proper divisors (7011915968889).

20021300031111 is a wasteful number, since it uses less digits than its factorization.

20021300031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740878.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20021300031111 its reverse (11113000312002), we get a palindrome (31134300343113).

The spelling of 20021300031111 in words is "twenty trillion, twenty-one billion, three hundred million, thirty-one thousand, one hundred eleven".