211101121020 has 24 divisors (see below), whose sum is σ = 591083139024. Its totient is φ = 56293632256.

The previous prime is 211101121013. The next prime is 211101121037. The reversal of 211101121020 is 20121101112.

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 = 211101120987 and 211101121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1759175949 + ... + 1759176068.

It is an arithmetic number, because the mean of its divisors is an integer number (24628464126).

Almost surely, 2^211101121020 is an apocalyptic number.

211101121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101121020 is an abundant number, since it is smaller than the sum of its proper divisors (379982018004).

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

211101121020 is a wasteful number, since it uses less digits than its factorization.

211101121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518352029 (or 3518352027 counting only the distinct ones).

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

Adding to 211101121020 its reverse (20121101112), we get a palindrome (231222222132).

The spelling of 211101121020 in words is "two hundred eleven billion, one hundred one million, one hundred twenty-one thousand, twenty".