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21010111203 = 3101180138501
BaseRepresentation
bin10011100100010011…
…001101101011100011
32000020020020020022210
4103210103031223203
5321012042024303
613352451333203
71342435666344
oct234423155343
960206206283
1021010111203
118a01729574
1240a42b1203
131c9aa45183
1410345060cb
1582e798203
hex4e44cdae3

21010111203 has 16 divisors (see below), whose sum is σ = 28307286432. Its totient is φ = 13860000000.

The previous prime is 21010111201. The next prime is 21010111207. The reversal of 21010111203 is 30211101012.

It is not a de Polignac number, because 21010111203 - 21 = 21010111201 is a prime.

It is a super-2 number, since 2×210101112032 (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010111201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526453 + ... + 564953.

It is an arithmetic number, because the mean of its divisors is an integer number (1769205402).

Almost surely, 221010111203 is an apocalyptic number.

21010111203 is a deficient number, since it is larger than the sum of its proper divisors (7297175229).

21010111203 is a wasteful number, since it uses less digits than its factorization.

21010111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40406.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21010111203 its reverse (30211101012), we get a palindrome (51221212215).

The spelling of 21010111203 in words is "twenty-one billion, ten million, one hundred eleven thousand, two hundred three".

Divisors: 1 3 101 303 1801 5403 38501 115503 181901 545703 3888601 11665803 69340301 208020903 7003370401 21010111203