211101022020020 has 36 divisors (see below), whose sum is σ = 487276987197252. Its totient is φ = 76764008006400.

The previous prime is 211101022019981. The next prime is 211101022020149. The reversal of 211101022020020 is 20020220101112.

It can be written as a sum of positive squares in 2 ways, for example, as 134430018604816 + 76671003415204 = 11594396^2 + 8756198^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211101022019977 and 211101022020004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43615911221 + ... + 43615916060.

Almost surely, 2^{211101022020020} is an apocalyptic number.

211101022020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101022020020 is an abundant number, since it is smaller than the sum of its proper divisors (276175965177232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211101022020020 is a wasteful number, since it uses less digits than its factorization.

211101022020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87231827312 (or 87231827299 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211101022020020 its reverse (20020220101112), we get a palindrome (231121242121132).

The spelling of 211101022020020 in words is "two hundred eleven trillion, one hundred one billion, twenty-two million, twenty thousand, twenty".