211120021020 has 48 divisors (see below), whose sum is σ = 593937687168. Its totient is φ = 56031850560.

The previous prime is 211120021003. The next prime is 211120021031. The reversal of 211120021020 is 20120021112.

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 = 211120020987 and 211120021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8325414 + ... + 8350733.

It is an arithmetic number, because the mean of its divisors is an integer number (12373701816).

Almost surely, 2^211120021020 is an apocalyptic number.

211120021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211120021020 is an abundant number, since it is smaller than the sum of its proper divisors (382817666148).

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

211120021020 is a wasteful number, since it uses less digits than its factorization.

211120021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676370 (or 16676368 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211120021020 its reverse (20120021112), we get a palindrome (231240042132).

The spelling of 211120021020 in words is "two hundred eleven billion, one hundred twenty million, twenty-one thousand, twenty".