211001021011020 has 96 divisors (see below), whose sum is σ = 593030332339200. Its totient is φ = 56055085899264.

The previous prime is 211001021011013. The next prime is 211001021011031. The reversal of 211001021011020 is 20110120100112.

It is a super-2 number, since 2×211001021011020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 211001021010987 and 211001021011005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19017501 + ... + 27994059.

It is an arithmetic number, because the mean of its divisors is an integer number (6177399295200).

Almost surely, 2^{211001021011020} is an apocalyptic number.

211001021011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211001021011020 is an abundant number, since it is smaller than the sum of its proper divisors (382029311328180).

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

211001021011020 is a wasteful number, since it uses less digits than its factorization.

211001021011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978047 (or 8978045 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211001021011020 its reverse (20110120100112), we get a palindrome (231111141111132).

It can be divided in two parts, 21100102 and 1011020, that added together give a palindrome (22111122).

The spelling of 211001021011020 in words is "two hundred eleven trillion, one billion, twenty-one million, eleven thousand, twenty".