Search a number
-
+
21101210102 = 278091863077
BaseRepresentation
bin10011101001101110…
…101110100111110110
32000110120122112112002
4103221232232213312
5321203402210402
613405504055302
71344623216660
oct235156564766
960416575462
1021101210102
118a490a0515
12410a904532
131cb389034b
14104265b530
15837790602
hex4e9bae9f6

21101210102 has 16 divisors (see below), whose sum is σ = 36218236320. Its totient is φ = 9032192448.

The previous prime is 21101210093. The next prime is 21101210159. The reversal of 21101210102 is 20101210112.

It is a super-2 number, since 2×211012101022 (a number of 21 digits) contains 22 as substring.

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, 920213 + ... + 942864.

It is an arithmetic number, because the mean of its divisors is an integer number (2263639770).

Almost surely, 221101210102 is an apocalyptic number.

21101210102 is a deficient number, since it is larger than the sum of its proper divisors (15117026218).

21101210102 is a wasteful number, since it uses less digits than its factorization.

21101210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863895.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101210102 its reverse (20101210112), we get a palindrome (41202420214).

The spelling of 21101210102 in words is "twenty-one billion, one hundred one million, two hundred ten thousand, one hundred two".

Divisors: 1 2 7 14 809 1618 5663 11326 1863077 3726154 13041539 26083078 1507229293 3014458586 10550605051 21101210102