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21211010219999 = 313112200084039
BaseRepresentation
bin1001101001010100100101…
…01110101011111111011111
32210002202022202211202002002
410310222102232223333133
510240010122104014444
6113040111545552515
74316305415034455
oct464522256537737
983082282752062
1021211010219999
1168385a23323a6
122466a044a573b
13bab260963b02
14534892b569d5
1526bb3147dd4e
hex134a92babfdf

21211010219999 has 8 divisors (see below), whose sum is σ = 21965639055360. Its totient is φ = 20460781553400.

The previous prime is 21211010219969. The next prime is 21211010220011. The reversal of 21211010219999 is 99991201011212.

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

It is not a de Polignac number, because 21211010219999 - 240 = 20111498592223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211010219929) 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, 1100032379 + ... + 1100051660.

It is an arithmetic number, because the mean of its divisors is an integer number (2745704881920).

Almost surely, 221211010219999 is an apocalyptic number.

21211010219999 is a deficient number, since it is larger than the sum of its proper divisors (754628835361).

21211010219999 is a wasteful number, since it uses less digits than its factorization.

21211010219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200084381.

The product of its (nonzero) digits is 52488, while the sum is 47.

The spelling of 21211010219999 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred nineteen thousand, nine hundred ninety-nine".

Divisors: 1 31 311 9641 2200084039 68202605209 684226136129 21211010219999