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BaseRepresentation
bin111011101000101…
…0010100001010100
312011110021101210100
41313101102201110
513044230133022
6530320454100
7100405253334
oct16721224124
95143241710
102001021012
11937584781
1247a17a330
1325b744003
1414da830c4
15baa151ac
hex77452854

2001021012 has 36 divisors (see below), whose sum is σ = 5067855520. Its totient is φ = 665725392.

The previous prime is 2001020981. The next prime is 2001021053. The reversal of 2001021012 is 2101201002.

Adding to 2001021012 its reverse (2101201002), we get a palindrome (4102222014).

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 = 2001020985 and 2001021003.

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, 34312 + ... + 71967.

Almost surely, 22001021012 is an apocalyptic number.

It is an amenable number.

2001021012 is an abundant number, since it is smaller than the sum of its proper divisors (3066834508).

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

2001021012 is a wasteful number, since it uses less digits than its factorization.

2001021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106812 (or 106807 counting only the distinct ones).

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

The square root of 2001021012 is about 44732.7733546669. The cubic root of 2001021012 is about 1260.1354125064.

The spelling of 2001021012 in words is "two billion, one million, twenty-one thousand, twelve".