2211001020 has 36 divisors (see below), whose sum is σ = 6706703640. Its totient is φ = 589600224.

The previous prime is 2211001007. The next prime is 2211001031. The reversal of 2211001020 is 201001122.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 2211000993 and 2211001011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6141490 + ... + 6141849.

Almost surely, 2^2211001020 is an apocalyptic number.

2211001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211001020 is an abundant number, since it is smaller than the sum of its proper divisors (4495702620).

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

2211001020 is a wasteful number, since it uses less digits than its factorization.

2211001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12283354 (or 12283349 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2211001020 is about 47021.2826281887. The cubic root of 2211001020 is about 1302.7556968441.

Adding to 2211001020 its reverse (201001122), we get a palindrome (2412002142).

The spelling of 2211001020 in words is "two billion, two hundred eleven million, one thousand, twenty".