211130121020 has 72 divisors (see below), whose sum is σ = 555434659584. Its totient is φ = 66819199104.

The previous prime is 211130120963. The next prime is 211130121023. The reversal of 211130121020 is 20121031112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 211130120986 and 211130121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211130121023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8273372 + ... + 8298851.

It is an arithmetic number, because the mean of its divisors is an integer number (7714370272).

Almost surely, 2^211130121020 is an apocalyptic number.

211130121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211130121020 is an abundant number, since it is smaller than the sum of its proper divisors (344304538564).

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

211130121020 is a wasteful number, since it uses less digits than its factorization.

211130121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16572259 (or 16572250 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211130121020 its reverse (20121031112), we get a palindrome (231251152132).

The spelling of 211130121020 in words is "two hundred eleven billion, one hundred thirty million, one hundred twenty-one thousand, twenty".