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BaseRepresentation
bin10001110001011011010…
…001011111001110111101
311022202101122020000011000
4101301123101133032331
5130002211304214401
62333020340520513
7154144000624446
oct21613321371675
94282348200130
101221302023101
11430a51175366
121788436b0139
138b2259583c4
144317b6da2cd
1521b7ede6186
hex11c5b45f3bd

1221302023101 has 64 divisors (see below), whose sum is σ = 1863142973440. Its totient is φ = 790404894720.

The previous prime is 1221302023099. The next prime is 1221302023159. The reversal of 1221302023101 is 1013202031221.

1221302023101 is a `hidden beast` number, since 1 + 22 + 130 + 202 + 310 + 1 = 666.

It is not a de Polignac number, because 1221302023101 - 21 = 1221302023099 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 (1221302023301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40354491 + ... + 40384743.

It is an arithmetic number, because the mean of its divisors is an integer number (29111608960).

Almost surely, 21221302023101 is an apocalyptic number.

It is an amenable number.

1221302023101 is a deficient number, since it is larger than the sum of its proper divisors (641840950339).

1221302023101 is a wasteful number, since it uses less digits than its factorization.

1221302023101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30643 (or 30637 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1221302023101 its reverse (1013202031221), we get a palindrome (2234504054322).

The spelling of 1221302023101 in words is "one trillion, two hundred twenty-one billion, three hundred two million, twenty-three thousand, one hundred one".