211110010020 has 240 divisors, whose sum is σ = 815089701888. Its totient is φ = 44541861120.

The previous prime is 211110009991. The next prime is 211110010141. The reversal of 211110010020 is 20010011112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 211110009984 and 211110010011.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 568596 + ... + 863435.

Almost surely, 2^211110010020 is an apocalyptic number.

211110010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211110010020 is an abundant number, since it is smaller than the sum of its proper divisors (603979691868).

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

211110010020 is a wasteful number, since it uses less digits than its factorization.

211110010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432072 (or 1432061 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 211110010020 its reverse (20010011112), we get a palindrome (231120021132).

The spelling of 211110010020 in words is "two hundred eleven billion, one hundred ten million, ten thousand, twenty".