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1021220011 = 7314706083
BaseRepresentation
bin111100110111101…
…001010010101011
32122011121100111101
4330313221102223
54042413020021
6245200142231
734210140550
oct7467512253
92564540441
101021220011
114844a7789
12246007977
131337599c6
14998b2a27
155e9c3a91
hex3cde94ab

1021220011 has 8 divisors (see below), whose sum is σ = 1204757504. Its totient is φ = 847094760.

The previous prime is 1021219957. The next prime is 1021220021. The reversal of 1021220011 is 1100221201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021220011 - 219 = 1020695723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021220011.

It is not an unprimeable number, because it can be changed into a prime (1021220021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2352825 + ... + 2353258.

It is an arithmetic number, because the mean of its divisors is an integer number (150594688).

Almost surely, 21021220011 is an apocalyptic number.

1021220011 is a deficient number, since it is larger than the sum of its proper divisors (183537493).

1021220011 is an equidigital number, since it uses as much as digits as its factorization.

1021220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706121.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1021220011 is about 31956.5331505156. The cubic root of 1021220011 is about 1007.0238865105.

Adding to 1021220011 its reverse (1100221201), we get a palindrome (2121441212).

The spelling of 1021220011 in words is "one billion, twenty-one million, two hundred twenty thousand, eleven".

Divisors: 1 7 31 217 4706083 32942581 145888573 1021220011