211001001020 has 24 divisors (see below), whose sum is σ = 443213965824. Its totient is φ = 84379093056.

The previous prime is 211001001019. The next prime is 211001001031. The reversal of 211001001020 is 20100100112.

It is a junction number, because it is equal to n+sod(n) for n = 211001000989 and 211001001007.

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, 1250387 + ... + 1409066.

It is an arithmetic number, because the mean of its divisors is an integer number (18467248576).

Almost surely, 2^211001001020 is an apocalyptic number.

211001001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211001001020 is an abundant number, since it is smaller than the sum of its proper divisors (232212964804).

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

211001001020 is a wasteful number, since it uses less digits than its factorization.

211001001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663429 (or 2663427 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 211001001020 its reverse (20100100112), we get a palindrome (231101101132).

The spelling of 211001001020 in words is "two hundred eleven billion, one million, one thousand, twenty".