21020212203111 has 96 divisors (see below), whose sum is σ = 35089786368000. Its totient is φ = 12465121661280.

The previous prime is 21020212203097. The next prime is 21020212203139. The reversal of 21020212203111 is 11130221202012.

21020212203111 is a `hidden beast` number, since 210 + 20 + 2 + 122 + 0 + 311 + 1 = 666.

It is not a de Polignac number, because 21020212203111 - 2⁶ = 21020212203047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020212203161) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 514941060 + ... + 514981878.

It is an arithmetic number, because the mean of its divisors is an integer number (365518608000).

Almost surely, 2^{21020212203111} is an apocalyptic number.

21020212203111 is a deficient number, since it is larger than the sum of its proper divisors (14069574164889).

21020212203111 is a wasteful number, since it uses less digits than its factorization.

21020212203111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44991 (or 44979 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21020212203111 its reverse (11130221202012), we get a palindrome (32150433405123).

The spelling of 21020212203111 in words is "twenty-one trillion, twenty billion, two hundred twelve million, two hundred three thousand, one hundred eleven".